73 results on '"V. Juhan"'
Search Results
2. Douleurs pelviennes chroniques
- Author
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V. Juhan-Duguet
- Abstract
Resume Les douleurs pelviennes chroniques sont des douleurs invalidantes qui durent depuis au moins 6 mois. Les causes sont souvent multifactorielles. Un interrogatoire et un examen clinique minutieux doivent orienter les examens d’imagerie. L’endometriose est une cause frequente, mais il n’y a pas de correlation entre la gravite des lesions et l’intensite de la douleur. L’echographie pelvienne est le premier examen a realiser, a la recherche d’endometriose, d’adenomyose, de varices pelviennes, et de signes d’infection chronique. L’IRM permet de faire le diagnostic et le bilan d’extension des endometrioses. Elle est plus performante que l’echographie pour le diagnostic d’abces tubo-ovarien devant une masse annexielle chronique. L’echo-Doppler, l’angio-IRM doivent permettre de conforter le diagnostic clinique de congestion pelvienne. Devant un syndrome du nerf pudendal l’imagerie en coupe peut eliminer une cause compressive.
- Published
- 2015
3. ShearWave™ Elastography BE1 Multinational Breast Study: Additional SWE™ Features Support Potential to Downgrade BI-RADS®-3 Lesions
- Author
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F. Schäfer, R. Hooley, R. Ohlinger, U. Hahne, H. Madjar, W. Svensson, C. Balu-Maestro, V. Juhan, A. Athanasiou, A. Mundinger, B. Order, M. Locatelli, D. Cosgrove, O. Wolf, J. Henry, M. Moutfi, J. Gay, and C. Cohen-Bacrie
- Subjects
Adult ,Risk ,medicine.medical_specialty ,Population ,Breast Neoplasms ,Downgrade ,Malignancy ,Sensitivity and Specificity ,Young Adult ,Cytology ,Image Interpretation, Computer-Assisted ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Prospective cohort study ,education ,Aged ,Neoplasm Staging ,Aged, 80 and over ,education.field_of_study ,medicine.diagnostic_test ,business.industry ,Ultrasound ,Cancer ,Equipment Design ,Middle Aged ,Image Enhancement ,medicine.disease ,Surgery ,Elasticity Imaging Techniques ,Female ,Ultrasonography, Mammary ,Radiology ,Elastography ,Neoplasm Grading ,business - Abstract
PURPOSE To determine the benefit of ShearWave™ Elastography (SWE™) in the ultrasound characterization of BI-RADS® 3 breast lesions in a diagnostic population. MATERIALS AND METHODS 303 BI-RADS® 3 lesions (mean size: 13.2 mm, SD: 7.5 mm) from the multicenter BE1 prospective study population were analyzed: 201 (66%) had cytology or core biopsy, and the remaining 102 had a minimum follow-up of one year; 8 (2.6%) were malignant. 7 SWE features were evaluated with regard to their ability to downgrade benign BI-RADS® 3 masses. The performance of each SWE feature was assessed by evaluating the number of lesions correctly reclassified and the impact on cancer rates within the new BI-RADS® 3' lesion group. RESULTS No malignancies were found with an E-color "black to dark blue", which allowed the downgrading of 110/303 benign masses (p < 0.0001), with a non-significant increase in BI-RADS® 3' malignancy rate from 2.6% to 4.1%. E-max ≤ 20 kPa (2.6 m/s) was able to downgrade 48/303 (p < 0.0001) lesions with a lower increase in BI-RADS® 3' malignancy rate (3.1%). No other SWE features were useful for reclassifying benign BI-RADS® 3 lesions. CONCLUSION Applying simple reclassification rules, SWE assessment of the maximum stiffness of lesions allowed the downgrading of a sub-group of benign BI-RADS® 3 lesions. This was accompanied by a non-significant increase in the malignancy rate in the new BI-RADS® 3 class.
- Published
- 2013
4. Chronic pelvic pain: An imaging approach
- Author
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V. Juhan
- Subjects
Adult ,Diagnostic Imaging ,medicine.medical_specialty ,Endometriosis ,Pelvic congestion syndrome ,Pelvic Pain ,Adnexal mass ,Medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Adenomyosis ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,business.industry ,Pelvic pain ,Pudendal neuralgia ,Chronic pain ,Magnetic resonance imaging ,General Medicine ,medicine.disease ,Surgery ,Deep infiltrating endometriosis ,Female ,Radiology ,medicine.symptom ,Chronic Pain ,business ,Genital Diseases, Female ,Chronic pelvic pain - Abstract
Chronic pelvic pain is defined as disabling pain of at least six months duration. Chronic pelvic pain has often multiple causative factors. Careful analysis of clinical history and detailed clinical examination must be carried out to guide further imaging investigations. Endometriosis is a common cause of chronic pelvic pain, although there is no correlation between the severity of lesions and pain intensity. Pelvic ultrasonography should be the first line imaging examination to search for causative conditions that include endometriosis, adenomyosis, pelvic varices and chronic infection. Magnetic resonance imaging (MRI) is useful for making the positive diagnosis and assessing the spread of endometriosis. MRI is more accurate than ultrasonography for the diagnosis of tubo-ovarian abscess when an adnexal mass is identified. Duplex and color Doppler ultrasonography as well as MR angiography are the best imaging technique for the diagnosis of pelvic congestion syndrome. In patients with pudendal neuralgia, cross-sectional imaging help exclude nerve compression.
- Published
- 2015
5. Hystérosalpingographie et cathétérisme sélectif des trompes
- Author
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A. Maubon, J. Villeval, Jean-Pierre Rouanet, M. de Graef, R. Guillon, V Juhan, and Z. Kassem
- Subjects
Gynecology ,medicine.medical_specialty ,Philosophy ,medicine ,Radiology, Nuclear Medicine and imaging - Abstract
Resume En 2003, la principale indication de l'hysterosalpingographie est l'infertilite a la recherche d'une origine tubaire. La salpingographie selective est toujours consecutive a une hysterosalpingographie laissant supposer une obstruction tubaire proximale. Si les trompes ne sont pas permeables au cours de l'hysterographie, un catheterisme tubaire sera effectue dans le meme temps en accord avec son correspondant gynecologue. Elle presente un double interet : diagnostique, elle determine le site de l'obstruction et parfois l'etiologie ; therapeutique, l'injection selective sous pression de produit de contraste intratubaire peut permettre une desobstruction. Elle est systematiquement realisee avant la recanalisation tubaire reservee aux echecs de l'opacification selective. La salpingographie selective peut etre proposee de premiere intention apres l'hysterosalpingographie, avant des methodes plus invasives.
- Published
- 2005
6. Dynamic MR Imaging of pelvic prolapse
- Author
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J.-M. Bartoli, V. Juhan-Duguet, P Champsaur, L. Thuillier, A Maubon, A Agostini, and G. Moulin
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Gynecology ,medicine.medical_specialty ,Reproductive Medicine ,Pelvic prolapse ,Philosophy ,Dynamic mr ,medicine ,Obstetrics and Gynecology ,General Medicine - Abstract
L'IRM pelvienne statique et dynamique fait maintenant partie de l'arsenal diagnostique du clinicien pour l'exploration des prolapsus pelviens. C'est un examen de deuxieme intention, non invasif, non irradiant, de realisation simple, reproductible et qui permet de visualiser l'ensemble du contenu pelvien dans differents plans, au repos et en dynamique. De plus un examen clinique est possible dans la machine. Les sequences utilisees sont essentiellement des sequences dans le plan sagittal en ponderation T2. L'IRM permet de detecter des prolapsus multiples et d'apprecier la trophicite musculaire du plancher pelvien. Elle peut etre proposee en cas de doute clinique, dans les prolapsus complexes ou en cas de recidive postoperatoire. Son interet n'est reel que si cet examen est confronte a l'examen clinique.
- Published
- 2002
7. La camptocormie : un signe de myopathie axiale.À propos de sept observations
- Author
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U. Michon-Pasturel, P.Y. Hatron, Patrick Disdier, B Devulder, V Juhan, N. Boutry, André Thevenon, V. Lemaitre, V. Delcey, Jacques Serratrice, P Vanhille, Eric Hachulla, and Viviane Queyrel
- Subjects
Gynecology ,medicine.medical_specialty ,business.industry ,Gastroenterology ,Internal Medicine ,medicine ,Congenital disease ,business - Abstract
Resume Propos. – La camptocormie ou cyphose lombaire progressive est une projection du tronc vers l’avant apparaissant en position debout ou plus volontiers a la marche et reductible en decubitus. Il s’agit d’une atteinte musculaire paravertebrale du sujet âge de plus de 60 ans correspondant a une involution graisseuse des muscles spinaux dont le mecanisme ne fait pas l’unanimite. Methode. – Nous rapportons sept observations de camptocormie revelant une authentique myopathie. Resultat. – Il s’agit de cinq femmes et de deux hommes âges de 55 a 72 ans. Tous les patients ont en commun une attitude camptocormique ainsi qu’une degenerescence adipeuse des muscles paravertebraux particulierement bien visible a l’IRM. Les quatre premiers patients repondent aux criteres de Bohan et Peter de polymyosite et dermatomyosite. Dans les autres cas, la biopsie musculaire paravertebrale ou peripherique permet de diagnostiquer une myopathie congenitale, une myopathie mitochondriale et une myopathie amyloide. Les quatre premiers patients ont beneficie d’un traitement par corticoides associes soit aux immunoglobulines polyvalentes soit a la cyclosporine avec une amelioration de la camptocormie dans trois cas. Le traitement dans les autres cas a comporte une chimiotherapie du fait de la severite du syndrome nephrotique dans le cas de l’amylose AL, un traitement par coenzyme Q chez le patient atteint de cytopathie mitochondriale et une kinesitherapie seule dans le cas de la myopathie congenitale : aucune amelioration de la camptocormie n’a ete observee chez ces trois patients. Conclusion. – La camptocormie apparait comme un symptome musculaire refletant une myopathie axiale et repondant a des causes multiples et variees. Sa decouverte implique un bilan etiologique afin de proposer un traitement adapte associee a la reeducation.
- Published
- 2002
8. Une hépatite C bien compliquée…
- Author
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J. Serratrice, M. F. Blancard, M. Zanaret, L. Swiader, V Juhan, M A Chrestian, Pierre-Jean Weiller, Patrick Disdier, Emmanuelle Bernit, B. Granel, and X. Pache
- Subjects
business.industry ,Gastroenterology ,Internal Medicine ,Medicine ,Hepatitis C ,Zygomycosis ,business ,medicine.disease ,Virology - Published
- 2000
9. Cas radio-clinique - discussion interactive
- Author
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A. Colavolpe, O. Monnet, J.-M. Bartoli, and V. Juhan-Duguet
- Subjects
business.industry ,Medicine ,Surgery ,business - Published
- 2004
10. Fait-on trop de micro- ou de macrobiopsies?
- Author
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V. Juhan, S. Coze, and P. Siles
- Abstract
Les prelevements percutanes font, depuis plusieurs annees, partie integrante de la strategie diagnostique et therapeutique du cancer du sein. Ils ont permis une amelioration indeniable de la prise en charge de cette pathologie. Les microbiopsies sont largement utilisees depuis les annees 1990, essentiellement pour les masses, sous controle echographique; et les macrobiopsies avec aspiration sous controle stereotaxique, plus recentes, pour les microcalcifications. Ces prelevements ont permis de remplacer le plus souvent les interventions chirurgicales diagnostiques, faisant ainsi augmenter la valeur predictive positive (VPP) de ces interventions.
- Published
- 2012
11. ClearPEMSonic : imagerie mammaire multimodale couplant PEM et échographie : aspects techniques et résultats cliniques préliminaires
- Author
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O. Mundler, Benjamin Frisch, V. Juhan, L. Tessonnier, Paul Lecoq, P. Siles, N. Felix, R. Bughalo, F. Rodriguez, M. Pizzichemi, Tessonnier, L, Frisch, B, Siles, P, Pizzichemi, M, Bughalo, R, Juhan, V, Rodriguez, F, Félix, N, Mundler, O, and Lecoq, P
- Subjects
Radiological and Ultrasound Technology ,business.industry ,Biophysics ,Medicine ,Radiology, Nuclear Medicine and imaging ,business ,Positron Emission Tomography, Mammography - Published
- 2012
12. 157: ClearPEM-Sonic: a multimodal PET-ultrasound mammography system
- Author
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O. Mundler, J. Peter, V. Juhan, Benjamin Frisch, F Farina, M. Pizzichemi, P. Siles, Joao Varela, D. Jun, Serge Mensah, N. Di Vara, J.C. Rasteiro Da Silva, Alessio Ghezzi, Paul Lecoq, Philippe Lasaygues, l. Tessonnier, R. Bugalho, R. Silva-Silva, Josiane S. Neves, G. Cucciati, Liu Cao, E.A. Hillemanns, Stefaan Tavernier, Marco Paganoni, and Nuno Damácio de Carvalho Félix
- Subjects
medicine.diagnostic_test ,Computer science ,business.industry ,Detector ,Ultrasound ,Hematology ,medicine.disease ,Lyso ,030218 nuclear medicine & medical imaging ,3. Good health ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,Oncology ,Positron emission tomography ,030220 oncology & carcinogenesis ,medicine ,Medical imaging ,Mammography ,Radiology, Nuclear Medicine and imaging ,Elastography ,Nuclear medicine ,business - Abstract
The ClearPEM-Sonic is a multimodal system dedicated to mammography, capable of providing co-registered metabolic, anatomical and structural information through combination of positron emission tomography with ultrasound elastographic imaging. The project is aimed to improve early stage detection of breast cancer through the high-resolution and high-sensitivity metabolic information provided by PEM, and the high-resolution anatomic information from US. Further improvements in the specificity of the system is provided by the ability to rule out non-cancerous findings from PEM, taking advantage of elastography imaging information. The ClearPEM-Sonic has been developed by the Crystal Clear Collaboration and is currently installed at Hopital Nord, Marseille, in the frame of CERIMED, the European Centre for Research in Medical Imaging. The detector is based on LYSO:Ce crystals, each of 2x2x20 mm3, grouped in 192 matrices of 8x4 crys- tals. BaSO4 is used as coating material and reflector. Read out is performed individually on both 2x2 mm2 faces of each crystal, using avalanche photodiodes (APDs). The detector performance has been thoroughly tested during the commissioning phase, confirming a spatial resolution of 1.5 mm, and a DOI precision of 2 mm. The co-registration software developed has proved to accurately superimpose images coming from the different modalities with a precision better than 2 mm. The clinical trial (phase 1) is being carried out on 20 patients with a known breast lesion who have been injected with FDG for a whole-body PET/CT as part of their diagnostic process. Results are compared to conventional imaging and MRI, with biopsy as a golden standard, to validate the use of ClearPEM-Sonic as a clinical imaging instrument for early detection of breast cancer.
- Published
- 2014
13. Le sixième cas…
- Author
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J. Serratrice, Nicoleta Ene, L. Swiader, H Lipidi, C. de Roux-Serratrice, Karin Mazodier, Patrick Disdier, X. Pache, V Juhan, B. Granel, and Pierre-Jean Weiller
- Subjects
medicine.medical_specialty ,Hyperparathyroidism ,Systemic disease ,Vascular disease ,business.industry ,Gastroenterology ,medicine.disease ,Giant cell arteritis ,Hematoma ,X ray computed ,Internal Medicine ,medicine ,Radiology ,business ,Vasculitis ,Complication - Published
- 2001
14. ShearWave™ Elastography A new real time imaging mode for assessing quantitatively soft tissue viscoelasticity
- Author
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A. Athanasiou, Aline Laure Criton, J. Souquet, Jeremy Bercoff, C.C. Bacrie, J.-L. Gennisson, D. Amy, Mathias Fink, T. Deffieux, V. Juhan, A. Colavolpe, and Mickael Tanter
- Subjects
medicine.medical_specialty ,Reproducibility ,Materials science ,medicine.diagnostic_test ,Mode (statistics) ,Soft tissue ,Real time imaging ,01 natural sciences ,Viscoelasticity ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,0103 physical sciences ,medicine ,Radiology ,Elastography ,Elasticity (economics) ,Core biopsy ,010301 acoustics ,Biomedical engineering - Abstract
ShearWavetrade Elastography (SWE) is a new real time ultrasound imaging mode that quantitatively measures local tissue elasticity in kPa. Based on the Supersonic Shear Imaging concept (developed at the Laboratoire Ondes et Acoustique, Paris), this new concept may appear as a promising tool to improve breast lesion characterization. In vitro experimental measurements have been performed to quantify SWE mode performances in terms of resolution, penetration and the ability to measure quantitatively elasticity. Results show that the SWE mode exhibits a millimetric resolution and quantifies properly tissue elasticity on a wide range of elastic contrasts (from 7 to 110 kPa). The real time capabilities and the robustness of the mode have been tested in clinical conditions, on breast lesions. 150 patients have been scanned with SWE mode in three different sites. Results show that SWE performs well on breast pathologies and presents a very good inter-site reproducibility. Finally, the quantitative elasticity value was analyzed as a function of pathology using FNA or core biopsy as the reference diagnostic method.
- Published
- 2008
15. Placenta accreta: a review of current advances in prenatal diagnosis
- Author
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Florence Bretelle, Guillaume Gorincour, Chafika Mazouni, and V. Juhan
- Subjects
Pregnancy ,medicine.medical_specialty ,Fetal dna ,Placenta accreta ,business.industry ,Obstetrics ,Obstetrics and Gynecology ,Prenatal diagnosis ,Placenta Accreta ,Maternal blood ,medicine.disease ,Prenatal screening ,medicine.anatomical_structure ,Reproductive Medicine ,Placenta ,Prenatal Diagnosis ,medicine ,Humans ,Female ,business ,Biomarkers ,Developmental Biology ,Placenta Diseases ,Ultrasonography - Abstract
Placenta accreta is a life-threatening obstetrical condition requiring a multidisciplinary approach. Despite identified obstetrical risk factors, the diagnosis is often made at the time of delivery. Recent advances in biology could allow a prenatal screening of placenta accreta with the identification of biological markers in maternal blood including cell-free fetal DNA, placental mRNA, and DNA microarray. These promising technologies can detect the presence of anomalies and should play a future role in developing a better understanding of placental invasion. Ultrasound imaging is popular due to its low cost and accessibility and widely used for the screening of placenta location and potential abnormal development. This exam is associated with high sensitivity and specificity for diagnosis of placenta accreta when specific defined criteria are used for the diagnosis. A placental MRI provides a morphological description, as well as recently demonstrated topographical information that optimizes diagnosis and surgical management. The screening of placenta accreta should be improved with the use of a combination of these diagnostic techniques and benefit high-risk populations with a reduction in morbidity.
- Published
- 2006
16. [MRI and pelvic prolapse]
- Author
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V, Juhan-Duguet, L, Thuillier, A, Agostini, P, Champsaur, A, Maubon, J M, Bartoli, and G, Moulin
- Subjects
Treatment Outcome ,Recurrence ,Uterine Prolapse ,Humans ,Female ,Magnetic Resonance Imaging - Abstract
Static and dynamic pelvic IRM is nowadays part of the diagnostic work up of pelvic prolapse. It is a second line examination, diagnosis being made primarily on the basis of findings at physical pelvic examination. Advantages of MR imaging include lack of ionising radiation, simplicity, multiplanar imaging capability, and possibility to explore at the same time the three compartments and the pelvic floor. The dynamic MR Imaging can be coupled with a clinical examination at the magnet. Imaging is useful in patients in whom findings at physical examination are equivocal. Dynamic MR imaging can be useful in evaluating pelvic organ prolapse. It allows detection of hidden prolapses and assessment of muscle trophycity. Post-operatively it allows assessment of surgical results and failures or recurrences.
- Published
- 2002
17. [Camptocormia: a sign of axial myopathy. Report of 7 cases]
- Author
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V, Delcey, E, Hachulla, U, Michon-Pasturel, V, Queyrel, P Y, Hatron, N, Boutry, V, Lemaitre, P, Vanhille, J, Serratrice, P, Disdier, V, Juhan, B, Devulder, and A, Thévenon
- Subjects
Male ,Muscular Diseases ,Disease Progression ,Humans ,Female ,Kyphosis ,Middle Aged ,Aged - Abstract
Camptocormia or progressive lumbar kyphosis is an anterior bend of the trunk. It appears in orthostatism or while walking and is reducible in the decubitus position. It concerns patients older than 60 years of age. It is due to a fatty degeneration of the paravertebral muscles, although the physiopathology remains unclear.We report seven cases of camptocormia revealing authentic myopathies.Our observations concern five women and two men of 55 to 72 years of age. All patients present lumbar kyphosis and had a fatty involution of the paraspinal muscles on the muscular MRI. Four patients fulfilled the Bohan and Peter criteria of polymyositis and dermatomyositis. In the other cases paravertebral muscular biopsies led to the diagnosis of a congenital myopathy, a mitochondrial myopathy and an amyloid myopathy. Four patients received a corticosteroid-immunoglobulins or cyclosporin regimen. An improvement in the camptocormia was observed in three cases. In the other cases the treatment consisted of chemotherapy on account of severe nephrotic syndrome, a coenzyme-Q treatment for the patient with mitochondrial myopathy and only physiotherapy in the case of congenital myopathy, but without positive effect on camptocormia.Camptocormia appears as a muscular symptom that may reveal an axial myopathy due to multiple and varied pathologies. Thus, the discovery of camptocormia requires an aetiological investigation in order to propose an adequate treatment, which should be associated with physiotherapy.
- Published
- 2002
18. Shear Wave Elastography Improves the Specificity of Breast Ultrasound
- Author
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W. Berg, D. Cosgrove, C. Doré, F. Schäfer, W. Svensson, R. Hooley, R. Ohlinger, E.B. Mendelson, C. Balu-maestro, M. Locatelli, C. Tourasse, B. Cavanaugh, V. Juhan, T. Stavros, A. Tardivon, J. Gay, J. Henry, and C. Cohen-bacrie
- Subjects
Shear wave elastography ,Materials science ,Acoustics and Ultrasonics ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,Biophysics ,medicine ,Radiology, Nuclear Medicine and imaging ,Breast ultrasound ,Biomedical engineering - Published
- 2011
19. High signals in the uterine cervix on T2-weighted MRI sequences
- Author
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V Juhan, Jean-Pierre Rouanet, PY Daclin, R. Karam, M. De Graef, and A. Maubon
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Adult ,medicine.medical_specialty ,Uterine Cervical Neoplasms ,Cervix Uteri ,Diagnosis, Differential ,Uterine Cervical Diseases ,Medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Neuroradiology ,Aged ,Cervical cancer ,medicine.diagnostic_test ,business.industry ,Ultrasound ,Magnetic resonance imaging ,Interventional radiology ,General Medicine ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,Sagittal plane ,Uterine cervix ,medicine.anatomical_structure ,Female ,Radiology ,business ,T2 weighted - Abstract
The aim of this pictorial review was to illustrate the normal cervix appearance on T2-weighted images, and give a review of common or less common disorders of the uterine cervix that appear as high signal intensity lesions on T2-weighted sequences. Numerous aetiologies dominated by cervical cancer are reviewed and discussed. This gamut is obviously incomplete; however, radiologists who perform MR women's imaging should perform T2-weighted sequences in the sagittal plane regardless of the indication for pelvic MR. Those sequences will diagnose some previously unknown cervical cancers as well as many other unknown cervical or uterine lesions.
- Published
- 2001
20. [The sixth case....parathyroid adenoma]
- Author
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B, Granel, K, Mazodier, J, Serratrice, C, de Roux-Serratrice, N, Ene, H, Lipidi, X, Pache, V, Juhan, L, Swiader, P, Disdier, and P J, Weiller
- Subjects
Adenoma ,Diagnosis, Differential ,Male ,Hematoma ,Parathyroid Neoplasms ,Rupture, Spontaneous ,Mediastinal Diseases ,Humans ,Pain ,Mandibular Diseases ,Tomography, X-Ray Computed ,Aged - Published
- 2001
21. [Imaging of benign ovarian tumors]
- Author
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J P, Rouanet, A, Maubon, V, Juhan, R, Meny, A P, Salanon, and P Y, Daclin
- Subjects
Ovarian Neoplasms ,Cystadenoma ,Ovary ,Endometriosis ,Teratoma ,Fibroma ,Magnetic Resonance Imaging ,Diagnosis, Differential ,Humans ,Female ,Ovarian Diseases ,Thecoma ,Dermoid Cyst ,Ultrasonography - Abstract
A positive diagnosis of benign ovarian tumor indicates a laparoscopic approach or a conservative treatment. Benign ovarian tumors are often easy to recognize with non ionizing modalities such as US and MRI. The most common benign ovarian tumors are: mature teratomas including dermoid cysts, tumors in the fibro-thecal group including fibromas and thecomas, benign serous and mucinous tumors (cystadenomas). Apart from ovarian tumors, endometriomas are more commonly extra ovarian, but may involve the ovarian stroma.
- Published
- 2001
22. [Static and dynamic magnetic resonance imaging of the pelvic floor]
- Author
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A, Maubon, M P, Martel-Boncoeur, V, Juhan, C, Courtieu, R, Meny, P, Marès, and J P, Rouanet
- Subjects
Recurrence ,Uterine Prolapse ,Humans ,Female ,Pelvic Floor ,Image Enhancement ,Prognosis ,Magnetic Resonance Imaging - Abstract
MRI assessment of pelvic floor dysfunction is still fairly recent. It is a fast expanding field, owing to its safety and simplicity when compared to other imaging modalities. The possibility of direct dynamic imaging is a decisive input, and it can be coupled to a clinical examination at the magnet. The most widely used sequences are T2 weighted fast TSE or fast gradient echo, in the sagittal and frontal planes. Dynamic MRI of the pelvic floor allows pre-operative staging of prolapse, detection of hidden prolapses and assessment of muscle trophicity. Post-operatively it allows assessment of surgical results and failures or recurrences.
- Published
- 2001
23. [Static and dynamic MRI of the female pelvis]
- Author
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A, Maubon, M P, Martel-Boncoeur, V, Juhan, C, Courtieu, R, Meny, P, Mares, and J P, Rouanet
- Subjects
Postoperative Complications ,Uterine Prolapse ,Rectocele ,Humans ,Female ,Pelvic Floor ,Middle Aged ,Hysterectomy ,Image Enhancement ,Magnetic Resonance Imaging - Published
- 2001
24. Radiological follow-up of inverted papilloma
- Author
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V. Juhan, Guy Moulin, Jean-Michel Bartoli, Patrick Dessi, Michel Zanaret, Philippe Petit, Pierre Champsaur, L. Vivarrat-Perrin, C. Chagnaud, Vincent Vidal, and Jean-Yves Gaubert
- Subjects
Adult ,Male ,medicine.medical_specialty ,Inverted papilloma ,otorhinolaryngologic diseases ,Medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Sinusitis ,Neuroradiology ,Aged ,Retrospective Studies ,Aged, 80 and over ,Frontal sinus ,Papilloma, Inverted ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,General Medicine ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,Endoscopy ,Paranasal sinuses ,medicine.anatomical_structure ,Papilloma ,Female ,Radiology ,business ,Tomography, X-Ray Computed ,human activities ,Paranasal Sinus Neoplasms ,Follow-Up Studies - Abstract
The aim of this study was to describe cross-sectional imaging features of recurrent papilloma of the nasal fossa and paranasal sinuses and to evaluate the role of MR and CT in the postoperative follow-up of this lesion. Magnetic resonance imaging and CT of ten patients who presented recurrence of inverted papilloma were reviewed and correlated to initial imaging, endoscopy, and surgical reports. Imaging patterns of recurrent inverted papilloma are identical to those of initial tumors and recurrence location is closely related to the site of the former lesion. Magnetic resonance is more efficient than CT for the diagnosis and evaluation of extensions. Magnetic resonance supplies the deficiencies of endoscopy in case of extensions to the frontal sinus or the lateral recess of the antrum, especially if mucosal hyperplasia or sinusitis is associated. Magnetic resonance imaging is the first imaging modality to perform in the follow-up after removal of inverted papilloma.
- Published
- 2000
25. [Hepatitis C with many complications...]
- Author
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J, Serratrice, B, Granel, E, Bernit, X, Pache, L, Swiader, V, Juhan, M F, Blancard, M A, Chrestian, M, Zanaret, P, Disdier, and P J, Weiller
- Subjects
Adult ,Male ,Face ,Mucorales ,Humans ,Mucormycosis ,Hepatitis C ,Maxillary Diseases - Published
- 2000
26. [Accessory retrograde aneurysmal aortic lumen supplying the inferior mesenteric artery]
- Author
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P, Champsaur, V, Juhan, C, Scheiner, A, Branchereau, J, Bartoli, and C, Chagnaud
- Subjects
Blood Vessel Prosthesis Implantation ,Humans ,Female ,Mesenteric Artery, Inferior ,Thrombosis ,Tomography, X-Ray Computed ,Aortography ,Ligation ,Aged ,Aortic Aneurysm, Abdominal - Abstract
We report the case of a patient with infrarenal abdominal aortic aneurysm with mural thrombus covering the ostium of a patent inferior mesenteric artery (IMA). The IMA was supplied via flow from an accessory aneurysmal lumen within the mural thrombus that filled retrogradely from the aorta. This unusual pattern, associated with calcifications within the thrombus, raised the possibility of chronic aortic dissection.
- Published
- 2000
27. Static and dynamic MRI of a urinary control intra-vaginal device
- Author
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P. Aubas, V Juhan, M. P. Boncoeur-Martel, Jean Pierre Rouanet, C. Courtieu, A. S. Thurmond, P. Marès, and A. Maubon
- Subjects
musculoskeletal diseases ,Adult ,Urinary Incontinence, Stress ,Urinary Bladder ,Urinary incontinence ,Pelvis ,Urethra ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Prospective Studies ,Aged ,Urinary bladder ,medicine.diagnostic_test ,business.industry ,Ultrasound ,Magnetic resonance imaging ,General Medicine ,Anatomy ,Middle Aged ,Pessaries ,musculoskeletal system ,Magnetic Resonance Imaging ,Neck of urinary bladder ,medicine.anatomical_structure ,Dynamic contrast-enhanced MRI ,Female ,medicine.symptom ,business - Abstract
The aim of this study was to describe by MRI, in dynamic conditions at rest and straining, the anatomical modifications induced by a commercially available intravaginal device (IVD) aimed at relieving female stress urinary incontinence. Ten female patients complaining of stress urinary incontinence (SUI) had pelvic MRI with static and dynamic sequences, without and with a self-inserted IVD. We studied positions and angulations of the IVD in the pelvis. Paired t-test allowed comparisons of: position of the bladder neck; urethral angulation with the pubis axis; position of the urethra; and posterior urethro-vesical angle (PUVA) without and with IVD. At rest, in ten of ten cases IVD laid cranial to the pubo-rectal muscle; with an average angulation of 95 +/- 10 degrees with the pubis axis, laterally tilted in three of ten cases. In maximum straining with IVD bladder neck descent was lower by an average of 5.2 +/- 3.1 mm (p = 0.001), pubo-urethral angle opening was smaller by an average of 22 +/- 20 degrees (p = 0.015), and bladder neck to pubis distance was shorter by an average of 5.7 +/- 4 mm. Posterior urethro-vesical angle was not significantly modified. Dynamic MRI allowed a non-invasive assessment of the mode of action of an IVD. The main modifications were a support of the bladder base and bladder neck, with a superior displacement of the urethra toward the pubis.
- Published
- 2000
28. [Differential diagnosis of infective spondylodiscitis and erosive degenerative disk disease]
- Author
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P, Champsaur, C, Parlier-Cuau, V, Juhan, V, Daumen-Legré, C, Chagnaud, P, Lafforgue, J D, Laredo, and M, Kasbarian
- Subjects
Adult ,Aged, 80 and over ,Diagnosis, Differential ,Male ,Discitis ,Humans ,Female ,Spinal Diseases ,Middle Aged ,Tomography, X-Ray Computed ,Magnetic Resonance Imaging ,Osteochondritis ,Aged - Abstract
To assess the value of imaging in the differential diagnosis of erosive intervertebral osteochondrosis (EIVO) versus infectious discitis (ID).Twelve cases of EIVO and 30 cases of ID were reviewed to define the usefull signs for differential diagnosis on plain films, CT, and MR.No single sign is sufficient, but the association of several signs is suggestive of EIVO: discal vacuum phenomenom, well-defined sclerosis and erosions of vertebral endplates, high signal strip surrounding low signal of vertebral endplates on T1-weighted images.Imaging is helpful in difficult differential diagnosis of EIVO versus ID.
- Published
- 2000
29. Lupus cystitis: a possible additive risk factor for emphysematous cystitis in diabetes mellitus: discussion about one case
- Author
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J Rey, P.J. Weiller, J Serratrice, P Disdier, V Juhan, B Granel, and E Lechevalier
- Subjects
Blood Glucose ,medicine.medical_specialty ,endocrine system diseases ,Lumen (anatomy) ,Gastroenterology ,Rheumatology ,immune system diseases ,Risk Factors ,Emphysematous cystitis ,Internal medicine ,Diabetes mellitus ,Cystitis ,medicine ,Humans ,Lupus Erythematosus, Systemic ,In patient ,Risk factor ,skin and connective tissue diseases ,Emphysema ,Systemic lupus erythematosus ,business.industry ,Middle Aged ,medicine.disease ,Anti-Bacterial Agents ,Klebsiella Infections ,Klebsiella pneumoniae ,Diabetes Mellitus, Type 1 ,Immunology ,Drug Therapy, Combination ,Female ,business ,Tomography, X-Ray Computed - Abstract
Emphysematous cystitis (EC) is a rare condition in which gas-forming organisms are active in the bladder wall and lumen. Most of the cases have been described in patients suffering from diabetes mellitus due to glucosuria and subsequent anaerobic fermentation of glucose. To our knowledge this condition has never been described in association with systemic lupus erythematosus (SLE). We report here the first case of EC during the course of a chronic lupus cystitis (LC) in a woman suffering from SLE and type-I diabetes mellitus.
- Published
- 2000
30. [Non-ultrasonographic imaging of uterine fibromas]
- Author
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J P, Rouanet, V, Juhan, and A, Maubon
- Subjects
Adult ,Diagnosis, Differential ,Diagnostic Imaging ,Leiomyosarcoma ,Uterine Neoplasms ,Humans ,Female ,Magnetic Resonance Imaging - Published
- 2000
31. Erectile Dysfunction
- Author
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V. Juhan, D. Samama, M. André, and J. M. Bartoli
- Published
- 1999
32. Geometrical modelling of abdominal aortic aneurysms
- Author
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R. Bulot, J. M. Bartoli, V. Juhan, J. Sequeira, B. Nazarian, and K. Malkani
- Subjects
Leak ,Iliac artery ,medicine.medical_specialty ,Aortic lumen ,business.industry ,medicine.medical_treatment ,Stent ,medicine.disease ,Abdominal aortic aneurysm ,surgical procedures, operative ,cardiovascular system ,medicine ,cardiovascular diseases ,Radiology ,business ,Proximal neck - Abstract
Stent graft combination devices have been developed as a new alternative for treating abdominal aortic aneurysms. The major risk using this new technique with standard devices is the perigraft leak. In order to choose a suitable graft for each patient, and thus avoid such a risk, we have developed a program which provides three-dimensional representations of such aneurysms.
- Published
- 1997
33. L’elastographie ShearWaveTM, une nouvelle technique echographique pour quantifier l’elasticite des tissus mous
- Author
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V. Juhan-Duguet, Mickael Tanter, A. Athanasiou, D. Amy, Aline Laure Criton, Jeremy Bercoff, A. Colavolpe, Mathias Fink, J.-L. Gennisson, and J. Souquet
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs L’Elastographie ShearWaveTM (SWE) est une technique echographique en temps reel qui mesure l’elasticite des tissus en kilopascals (kPa). Cette quantification devrait completer les informations echographiques conventionnelles et ameliorer la caracterisation des lesions. Nous avons etudie retrospectivement la reproductibilite de la technique et la pertinence des informations d’elasticite dans la caracterisation des lesions mammaires. Materiels et methodes Cent quare vingt trois lesions mammaires ont ete evaluees dans trois centres cliniques. La reproductibilite a ete mesuree entre images consecutives acquises dans les memes conditions. Pour chacune des categories BI-RADS® 3,4 et 5, les mesures d’elasticite obtenues par SWE ont ete confrontees au diagnostic clinique. Resultats Toutes les lesions etudiees ont ete visualisees par SWE, avec une resolution spatiale millimetrique. Une mesure d’elasticite maximale a ete realisee sur toutes les lesions, de facon reproductible. L’elasticite moyenne des lesions cancereuses s’est averee significativement plus elevee que l’elasticite moyenne des lesions benignes (153 kPa [SD, 51,6 kPa] vs. 54 kPa [SD, 31 kPa]). Conclusion La SWE disponible sur le systeme echographique Aixplorer® fournit des mesures reproductibles de l’elasticite des tissus, qui semblent pouvoir completer les informations morphologiques obtenues par analyse des images 2D sur les lesions etudiees. La SWE a egalement montre une absence de signal dans les kystes simples.
- Published
- 2009
34. SEIN-WS-21 L’elastographie shearwave™, une nouvelle technique echographique pour quantifier l’elasticite des tissus mous
- Author
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A. Colavolpe, Aline Laure Criton, V. Juhan-Duguet, Jeremy Bercoff, J. Souquet, J.-L. Gennisson, D. Amy, A. Athanasiou, Mathias Fink, and Mickael Tanter
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs L’elastographie ShearWave™ (SWE) est une technique echographique en temps reel qui mesure l’elasticite des tissus en kilo-pascals (kPa). Cette quantification devrait completer les informations echographiques conventionnelles, et ameliorer la caracterisation des lesions. Nous avons etudie retrospectivement la reproductibilite de la technique et la pertinence des informations d’elasticite dans la caracterisation des lesions mammaires. Materiels et methodes Cent quatre vingt trois lesions mammaires ont ete evaluees dans trois centres cliniques. La reproductibilite a ete mesuree entre images consecutives acquises dans les memes conditions. Pour chacune des categories BI-RADS ® 3,4 et 5, les mesures d’elasticite obtenues par SWE ont ete confrontees au diagnostic clinique. Resultats Toutes les lesions etudiees ont ete visualisees par SWE, avec une resolution spatiale millimetrique. Une mesure d’elasticite maximale a ete realisee sur toutes les lesions, de facon reproductible. L’elasticite moyenne des lesions cancereuses s’est averee significativement plus elevee que l’elasticite moyenne des lesions benignes (153 kPa [SD, 51,6 kPa] vs. 54 kPa [SD, 31 kPa]). Conclusion La SWE disponible sur le systeme echographique Aix-plorer ® fournit des mesures reproductibles de l’elasticite des tissus, qui semblent pouvoir completer les informations morphologiques obtenues par analyse des images 2D sur les lesions etudiees. La SWE a egalement montre une absence de signal dans les kystes simples.
- Published
- 2009
35. Traitement conservateur du cancer du sein : semeiologie en IRM des recidives versus fibrose et cytosteatonose
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J.-M. Bartoli, V. Juhan-Duguet, and L. Thuillier
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Connaitre les differents aspects cicatriciels en IRM. Connaitre les remaniements lies a la radiotherapie et leur evolution dans le temps. Savoir differencier le rehaussement post therapeutique du rehaussement tumoral. Messages a retenir Une anomalie au contenu graisseux est une lesion de cytostetonecrose. Importance de la morphologie du rehaussement pour differencier fibrose postoperatoire et recidive. Se mefier des courbes dynamiques sur les seins traites. Resume L’IRM est un outil tres performant pour la recherche de recidive apres traitement conservateur d’un cancer du sein. Une cicatrice post-chirurgicale se rehausse rarement apres 8 mois. Le rehaussement interesse generalement toute la cicatrice (remaniement fibro-inflammatoire) contrairement au rehaussement tumoral qui est plutot nodulaire. Une lesion au contenu graisseux correspond a de la cytostetonecrose. Apres la radiotherapie, le rehaussement diffus de la glande peut etre genant au cours des premiers mois. Une fibrose « radio-induite » entraine ensuite une diminution du rehaussement du tissu mammaire. Tout rehaussement doit alors etre pris en compte. Dans un sein irradie, les courbes peuvent etre faussement rassurantes. L’interpretation de l’IRM se fait en correlation avec le bilan standard. Il est capital de connaitre les antecedents therapeutiques.
- Published
- 2009
36. Le type hystologique d’un cancer et son grade : peuvent-ils etre approches par l’IRM ?
- Author
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V. Juhan, J.M. Bartoli, and L. Thuillier
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Savoir bien etudier la morphologie du rehaussement. Connaitre les quelques criteres qui permettent d’orienter vers une lesion de haut grade. Connaitre les limites de l’IRM mammaire pour l’approche histologique. Points cles Un carcinome colloide est souvent en net hypersignal T2. Les criteres cinetiques sont peu predictifs d’une lesion de haut grade ou de bas grade. Un rehaussement suspect avec des contours bien nets est evocateur d’une lesion de haut grade. Un CCIS decouvert en IRM, sans traduction mammographique, serait plutot de haut grade. Resume Le type histologique est difficile a approcher en IRM. Les criteres morphologiques ou cinetiques sont peu specifiques pour faire la difference entre un cancer infiltrant lobulaire ou canalaire. Le cancer mucineux pur apparait souvent en net hypersignal T2. L’intensite de la prise de contraste et la morphologie du rehaussement ne sont pas des facteurs predictifs discriminatifs d’un type histologique. L’etude morphologique de la prise de contraste peut orienter vers une lesion infiltrante, ou in situ, mais elle est peu fiable. Les lesions infiltrantes qui presentent un rehaussement annulaire et un centre fibreux, ou des contours bien definis seraient plutot de haut grade. Les contours spicules seraient plutot en faveur d’une lesion infltrante de bas grade ou de grade intermediaire. Dans les CCIS (carcinomes canalaires in situ) purs, l’etude cinetique de rehaussement ne permet pas de determiner le grade. Les CCIS purs detectes en IRM, mais non vus sur la mammographie seraient plutot en faveur d’une lesion de haut grade. L’IRM fonctionnelle n’est actuellement pas assez performante pour l’etude discriminative du grade histologique.
- Published
- 2008
37. Experts
- Author
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V. Juhan-Duguet, I. Thomassin-Naggara, M. Filhastre, N. Marouteau-Pasquier, and P. George
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Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Published
- 2007
38. Lecture sur console numerique et usage du film
- Author
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I. Doutriaux-Dumoulin, P Heid, F. Thibault, L. Ceugnart, V. Juhan-Duguet, and B. Barreau
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Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Connaitre les principes et les conditions de lecture sur console numerique. Savoir gerer la qualite du support film et la diffusion de l’information. Resume Les regles de lecture sur console numerique sont decrites. Elles sont illustrees d’exemples pour presenter le deroulement de l’analyse d’une mammographie et pour montrer l’utilite des agrandissements geometriques pour les calcifications et du travail sur le contraste de l’image pour la detection des masses. Les differentes qualites de supports films sont appreciees en fonction des reglages du laser et comparees aux images sur console dans les conditions de lecture. La place du support film est discutee en depistage organise. Conclusion Les conditions de lecture determinent la qualite de l’interpretation.
- Published
- 2006
39. Nouvelle experience de catheters centraux inseres par voie peripherique : une innovation prometteuse
- Author
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Alexis Jacquier, Vincent Vidal, Marc Andre, Pierre Champsaur, O. Monnet, Jean-Michel Bartoli, V. Juhan-Duguet, Arthur Varoquaux, Guy Moulin, T. Le Corroller, and Jean Gaubert
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Rapporter la technique et le benefice de la mise en place de catheters centraux inseres par voie peripherique (PICCs) Materiels et methodes Deux cent dix-sept PICCs ont ete mis en place pour alimentation parenterale (129), chimiotherapie (75) ou antibiotherapie (13). La ponction veineuse etait realisee sous echographie et le positionnement distal du PICC au niveau de la veine cave superieure controle sous fluoroscopie sans injection de produit de contraste. Resultats Tous les PICCs ont pu etre inseres avec succes au niveau de la veine basilique (153), de la veine brachiale (48) ou de la veine cephalique (16). La duree d’utilisation moyenne du PICC etait de 16 jours (1 a 96 jours). Le taux de complications infectieuses etait de 2,7 % (6/217). Douze catheters (5,5 %) ont ete retires prematurement : 7 par retrait accidentel du au patient et 5 pour thrombose veineuse peripherique. Aucune complication majeure n’a ete notee Conclusion Les PICCs representent une alternative simple, sure et efficace au placement de voies veineuses centrales conventionnelles. Contrairement a ces dernieres, ils peuvent etre geres a domicile. Ce type de catheter largement utilise en Amerique du Nord devrait, dans les annees futures, devenir une activite quotidienne non negligeable des centres de radiologie interventionnelle.
- Published
- 2006
40. Les « kystes » extra-ovariens du pelvis feminin
- Author
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J.M. Bartoli, J. Vaillant, and V. Juhan-Duguet
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Reconnaitre une formation liquidienne pelvienne et determiner qu’elle n’est pas ovarienne. Savoir faire le diagnostic etiologique d’un kyste extra ovarien pelvien afin d’en optimiser la prise en charge. Resume Le kyste pelvien non ovarien peut etre d’origine tres diverse. La connaissance du dossier clinique est importante. L’echographie, pelvienne et endocavitaire, est souvent suffisante pour determiner l’origine extra ovarienne du kyste. Elle permet dans la majorite des cas de faire le diagnostic des anomalies kystiques uterines, tubaires, vaginales, urinaires, et parfois digestives. Elle peut etre insuffisante pour l’exploration des kystes volumineux ou posterieurs. L’IRM, permet par son approche multiplanaire de faire le diagnostic des kystes d’origine neurologique, articulaire et peritoneale. La nature liquidienne pure, hemorragique ou riche en proteine du contenu kystique est connue en etudiant le signal de la lesion. Conclusion L’etude topographique et morphologique du kyste doit permettre de detenniner son origine. L’analyse du signal en IRM permet d’en connaitre son contenu. Le diagnostic radiologique d’un kyste pelvien extra ovarien est necessaire pour eviter une prise en charge inadaptee.
- Published
- 2006
41. Semeiologie IRM des fibroleiomyomes uterins en evolution hydromyxoide (a propos de 9 cas)
- Author
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M. Viala Trentini, F. Dedouit, V. Juhan-Duguet, A. Maubon, M. Filhastre, Jean-Pierre Rouanet, and R. Guillon
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Connaitre et comprendre la semeiologie IRM des fibroleiomyomes en evolution hydropique et « myxoide ». Materiels et methodes Neuf dossiers IRM de tumeurs pelviennes qui se sont revelees etre des leiomyofibromes en evolution hydropique et « myxoide » ont ete analyses a posteriori. La semeiologie de ce type de lesions semble univoque. Resultats Le fibroleiomyome en evolution hydropique et « myxoide » possede une semiologie IRM caracteristique : – une masse en hypersignal heterogene T2 central. Cette masse est tres vascularisee en T1 Gadolinium – une partie peripherique liquidienne franche, manifestement bien visible en T1 Gadolinium – une paroi peripherique tres vascularisee. L’ovaire homolateral doit etre toujours recherche attentivement. Conclusion La semeiologie IRM des fibromes hydromyxoides est caracteristique. Elle doit etre connue par les imageurs de la femme car sinon ce diagnostic sera ignore avant l’intervention.
- Published
- 2005
42. 5221 Imagerie du sein traite benin (dont protheses) et malin
- Author
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V. Juhan-Duguet and J.Y. Seror
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs pedagogiques Savoir quand et comment utiliser les differentes techniques radiologiques pour le suivi des seins traites en dehors du cancer. Savoir quand et comment utiliser les differentes techniques radiologiques pour le suivi des seins apres traitement d’un cancer. Connaitre les aspects cliniques et radiologiques post therapeutiques normaux. Savoir prendre en charge une anomalie detectee sur une mammographie de suivi apres cancer du sein.
- Published
- 2005
43. Dynamic MR Imaging of pelvic prolapse
- Author
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V., Juhan-Duguet, primary, L., Thuillier, additional, A., Agostini, additional, P., Champsaur, additional, A., Maubon, additional, J.M., Bartoli, additional, and G., Moulin, additional
- Published
- 2002
- Full Text
- View/download PDF
44. Hématome spontané de la rate lors d'une primo-infection à cytomégalovirus chez un patient immunocompétent
- Author
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V Juhan, G Folchetti, J.M. Durand, P Piquet, C Zandotti, Gilles Kaplanski, and J Soubeyrand
- Subjects
Hematoma ,business.industry ,Immunology ,Gastroenterology ,Internal Medicine ,Congenital cytomegalovirus infection ,Medicine ,Cytomegalovirus infections ,Splenic disease ,Immunocompetence ,business ,medicine.disease - Published
- 1996
45. Development of ClearPEM-Sonic, a multimodal mammography system for PET and Ultrasound
- Author
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O. Mundler, D. Jun, Joao Varela, N. Di Vara, P. Siles, Benjamin Frisch, V. Juhan, G. Cucciati, Paul Lecoq, M. Pizzichemi, N. Felix, Jorge A. Neves, Philippe Lasaygues, F Farina, J. Peter, l. Tessonnier, S. Tavernier, Serge Mensah, João Carlos Silva, Etiennette Auffray, M. Paganoni, R. Bugalho, Rui F. Silva, A Ghezzi, Liji Cao, Physics, Elementary Particle Physics, Ondes et Imagerie (O&I), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Cucciati, G, Auffray, E, Bugalho, R, Cao, L, Vara, N, Farina, F, Felix, N, Frisch, B, Ghezzi, A, Juhan, V, Jun, D, Lasaygues, P, Lecoq, P, Mensah, S, Mundler, O, Neves, J, Paganoni, M, Peter, J, Pizzichemi, M, Siles, P, Silva, J, Silva, R, Tavernier, S, Tessonnier, L, and Varela, J
- Subjects
medicine.medical_specialty ,Computer science ,PET PET/CT ,Imaging phantom ,law.invention ,law ,Tissue elasticity ,Multimodality systems ,medicine ,Mammography ,3D ultrasound ,Medical physics ,Multimodality system ,Image resolution ,Instrumentation ,Gamma camera ,coronary CT angiography (CTA) ,Mathematical Physics ,medicine.diagnostic_test ,business.industry ,Ultrasound ,Detector ,3. Good health ,[PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] ,SPECT ,business - Abstract
International audience; ClearPEM-Sonic is an innovative imaging device specifically developed for breast cancer. The possibility to work in PEM-Ultrasound multimodality allows to obtain metabolic and morphological information increasing the specificity of the exam. The ClearPEM detector is developed to maximize the sensitivity and the spatial resolution as compared to Whole-Body PET scanners. It is coupled with a 3D ultrasound system, the SuperSonic Imagine Aixplorer that improves the specificity of the exam by providing a tissue elasticity map. This work describes the ClearPEM-Sonic project focusing on the technological developments it has required, the technical merits (and limits) and the first multimodal images acquired on a dedicated phantom. It finally presents selected clinical case studies that confirm the value of PEM information.
46. Ovarian-Adnexal Reporting Data System Magnetic Resonance Imaging (O-RADS MRI) Score for Risk Stratification of Sonographically Indeterminate Adnexal Masses.
- Author
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Thomassin-Naggara I, Poncelet E, Jalaguier-Coudray A, Guerra A, Fournier LS, Stojanovic S, Millet I, Bharwani N, Juhan V, Cunha TM, Masselli G, Balleyguier C, Malhaire C, Perrot NF, Sadowski EA, Bazot M, Taourel P, Porcher R, Darai E, Reinhold C, and Rockall AG
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Cohort Studies, Female, Humans, Middle Aged, Risk Assessment, Sensitivity and Specificity, Young Adult, False Negative Reactions, False Positive Reactions, Magnetic Resonance Imaging methods, Magnetic Resonance Imaging standards, Ovarian Diseases diagnosis, Ultrasonography methods, Ultrasonography standards
- Abstract
Importance: Approximately one-quarter of adnexal masses detected at ultrasonography are indeterminate for benignity or malignancy, posing a substantial clinical dilemma., Objective: To validate the accuracy of a 5-point Ovarian-Adnexal Reporting Data System Magnetic Resonance Imaging (O-RADS MRI) score for risk stratification of adnexal masses., Design, Setting, and Participants: This multicenter cohort study was conducted between March 1, 2013, and March 31, 2016. Among patients undergoing expectant management, 2-year follow-up data were completed by March 31, 2018. A routine pelvic MRI was performed among consecutive patients referred to characterize a sonographically indeterminate adnexal mass according to routine diagnostic practice at 15 referral centers. The MRI score was prospectively applied by 2 onsite readers and by 1 reader masked to clinical and ultrasonographic data. Data analysis was conducted between April and November 2018., Main Outcomes and Measures: The primary end point was the joint analysis of true-negative and false-negative rates according to the MRI score compared with the reference standard (ie, histology or 2-year follow-up)., Results: A total of 1340 women (mean [range] age, 49 [18-96] years) were enrolled. Of 1194 evaluable women, 1130 (94.6%) had a pelvic mass on MRI with a reference standard (surgery, 768 [67.9%]; 2-year follow-up, 362 [32.1%]). A total of 203 patients (18.0%) had at least 1 malignant adnexal or nonadnexal pelvic mass. No invasive cancer was assigned a score of 2. Positive likelihood ratios were 0.01 for score 2, 0.27 for score 3, 4.42 for score 4, and 38.81 for score 5. Area under the receiver operating characteristic curve was 0.961 (95% CI, 0.948-0.971) among experienced readers, with a sensitivity of 0.93 (95% CI, 0.89-0.96; 189 of 203 patients) and a specificity of 0.91 (95% CI, 0.89-0.93; 848 of 927 patients). There was good interrater agreement among both experienced and junior readers (κ = 0.784; 95% CI, 0.743-0824). Of 580 of 1130 women (51.3%) with a mass on MRI and no specific gynecological symptoms, 362 (62.4%) underwent surgery. Of them, 244 (67.4%) had benign lesions and a score of 3 or less. The MRI score correctly reclassified the mass origin as nonadnexal with a sensitivity of 0.99 (95% CI, 0.98-0.99; 1360 of 1372 patients) and a specificity of 0.78 (95% CI, 0.71-0.85; 102 of 130 patients)., Conclusions and Relevance: In this study, the O-RADS MRI score was accurate when stratifying the risk of malignancy in adnexal masses.
- Published
- 2020
- Full Text
- View/download PDF
47. Five simultaneous artificial intelligence data challenges on ultrasound, CT, and MRI.
- Author
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Lassau N, Estienne T, de Vomecourt P, Azoulay M, Cagnol J, Garcia G, Majer M, Jehanno E, Renard-Penna R, Balleyguier C, Bidault F, Caramella C, Jacques T, Dubrulle F, Behr J, Poussange N, Bocquet J, Montagne S, Cornelis F, Faruch M, Bresson B, Brunelle S, Jalaguier-Coudray A, Amoretti N, Blum A, Paisant A, Herreros V, Rouviere O, Si-Mohamed S, Di Marco L, Hauger O, Garetier M, Pigneur F, Bergère A, Cyteval C, Fournier L, Malhaire C, Drape JL, Poncelet E, Bordonne C, Cauliez H, Budzik JF, Boisserie M, Willaume T, Molière S, Peyron Faure N, Caius Giurca S, Juhan V, Caramella T, Perrey A, Desmots F, Faivre-Pierre M, Abitbol M, Lotte R, Istrati D, Guenoun D, Luciani A, Zins M, Meder JF, and Cotten A
- Subjects
- Breast Neoplasms diagnostic imaging, Communication, Computer Security, Humans, Interprofessional Relations, Kidney Cortex diagnostic imaging, Liver Neoplasms diagnostic imaging, Magnetic Resonance Imaging, Neoplasm Invasiveness diagnostic imaging, Thyroid Cartilage diagnostic imaging, Thyroid Neoplasms diagnostic imaging, Thyroid Neoplasms pathology, Tibial Meniscus Injuries diagnostic imaging, Tomography, X-Ray Computed, Ultrasonography, Artificial Intelligence, Datasets as Topic
- Abstract
Purpose: The goal of this data challenge was to create a structured dynamic with the following objectives: (1) teach radiologists the new rules of General Data Protection Regulation (GDPR), while building a large multicentric prospective database of ultrasound, computed tomography (CT) and MRI patient images; (2) build a network including radiologists, researchers, start-ups, large companies, and students from engineering schools, and; (3) provide all French stakeholders working together during 5 data challenges with a secured framework, offering a realistic picture of the benefits and concerns in October 2018., Materials and Methods: Relevant clinical questions were chosen by the Société Francaise de Radiologie. The challenge was designed to respect all French ethical and data protection constraints. Multidisciplinary teams with at least one radiologist, one engineering student, and a company and/or research lab were gathered using different networks, and clinical databases were created accordingly., Results: Five challenges were launched: detection of meniscal tears on MRI, segmentation of renal cortex on CT, detection and characterization of liver lesions on ultrasound, detection of breast lesions on MRI, and characterization of thyroid cartilage lesions on CT. A total of 5,170 images within 4 months were provided for the challenge by 46 radiology services. Twenty-six multidisciplinary teams with 181 contestants worked for one month on the challenges. Three challenges, meniscal tears, renal cortex, and liver lesions, resulted in an accuracy>90%. The fourth challenge (breast) reached 82% and the lastone (thyroid) 70%., Conclusion: Theses five challenges were able to gather a large community of radiologists, engineers, researchers, and companies in a very short period of time. The accurate results of three of the five modalities suggest that artificial intelligence is a promising tool in these radiology modalities., (Copyright © 2019 Soci showét showé françaises de radiologie. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2019
- Full Text
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48. Chronic pelvic pain: An imaging approach.
- Author
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Juhan V
- Subjects
- Adult, Endometriosis complications, Endometriosis diagnosis, Female, Humans, Chronic Pain etiology, Diagnostic Imaging, Genital Diseases, Female complications, Genital Diseases, Female diagnosis, Pelvic Pain etiology
- Abstract
Chronic pelvic pain is defined as disabling pain of at least six months duration. Chronic pelvic pain has often multiple causative factors. Careful analysis of clinical history and detailed clinical examination must be carried out to guide further imaging investigations. Endometriosis is a common cause of chronic pelvic pain, although there is no correlation between the severity of lesions and pain intensity. Pelvic ultrasonography should be the first line imaging examination to search for causative conditions that include endometriosis, adenomyosis, pelvic varices and chronic infection. Magnetic resonance imaging (MRI) is useful for making the positive diagnosis and assessing the spread of endometriosis. MRI is more accurate than ultrasonography for the diagnosis of tubo-ovarian abscess when an adnexal mass is identified. Duplex and color Doppler ultrasonography as well as MR angiography are the best imaging technique for the diagnosis of pelvic congestion syndrome. In patients with pudendal neuralgia, cross-sectional imaging help exclude nerve compression., (Copyright © 2015 Éditions françaises de radiologie. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2015
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49. ShearWave™ Elastography BE1 multinational breast study: additional SWE™ features support potential to downgrade BI-RADS®-3 lesions.
- Author
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Schäfer FK, Hooley RJ, Ohlinger R, Hahne U, Madjar H, Svensson WE, Balu-Maestro C, Juhan V, Athanasiou A, Mundinger A, Order B, Locatelli M, Cosgrove D, Wolf OJ, Henry JP, Moutfi M, Gay JM, and Cohen-Bacrie C
- Subjects
- Adult, Aged, Aged, 80 and over, Breast Neoplasms classification, Equipment Design, Female, Humans, Middle Aged, Neoplasm Grading, Neoplasm Staging, Risk, Sensitivity and Specificity, Young Adult, Breast Neoplasms diagnostic imaging, Breast Neoplasms pathology, Elasticity Imaging Techniques instrumentation, Elasticity Imaging Techniques methods, Image Enhancement methods, Image Interpretation, Computer-Assisted methods, Ultrasonography, Mammary instrumentation, Ultrasonography, Mammary methods
- Abstract
Purpose: To determine the benefit of ShearWave™ Elastography (SWE™) in the ultrasound characterization of BI-RADS® 3 breast lesions in a diagnostic population., Materials and Methods: 303 BI-RADS® 3 lesions (mean size: 13.2 mm, SD: 7.5 mm) from the multicenter BE1 prospective study population were analyzed: 201 (66%) had cytology or core biopsy, and the remaining 102 had a minimum follow-up of one year; 8 (2.6%) were malignant. 7 SWE features were evaluated with regard to their ability to downgrade benign BI-RADS® 3 masses. The performance of each SWE feature was assessed by evaluating the number of lesions correctly reclassified and the impact on cancer rates within the new BI-RADS® 3' lesion group., Results: No malignancies were found with an E-color "black to dark blue", which allowed the downgrading of 110/303 benign masses (p < 0.0001), with a non-significant increase in BI-RADS® 3' malignancy rate from 2.6% to 4.1%. E-max ≤ 20 kPa (2.6 m/s) was able to downgrade 48/303 (p < 0.0001) lesions with a lower increase in BI-RADS® 3' malignancy rate (3.1%). No other SWE features were useful for reclassifying benign BI-RADS® 3 lesions., Conclusion: Applying simple reclassification rules, SWE assessment of the maximum stiffness of lesions allowed the downgrading of a sub-group of benign BI-RADS® 3 lesions. This was accompanied by a non-significant increase in the malignancy rate in the new BI-RADS® 3 class., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2013
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50. Shear-wave elastography improves the specificity of breast US: the BE1 multinational study of 939 masses.
- Author
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Berg WA, Cosgrove DO, Doré CJ, Schäfer FK, Svensson WE, Hooley RJ, Ohlinger R, Mendelson EB, Balu-Maestro C, Locatelli M, Tourasse C, Cavanaugh BC, Juhan V, Stavros AT, Tardivon A, Gay J, Henry JP, and Cohen-Bacrie C
- Subjects
- Adult, Aged, Aged, 80 and over, Europe, Female, Humans, Internationality, Middle Aged, Prospective Studies, Reproducibility of Results, Sensitivity and Specificity, Shear Strength, United States, Young Adult, Elasticity Imaging Techniques methods, Image Enhancement methods, Ultrasonography, Mammary methods
- Abstract
Purpose: To determine whether adding shear-wave (SW) elastographic features could improve accuracy of ultrasonographic (US) assessment of breast masses., Materials and Methods: From September 2008 to September 2010, 958 women consented to repeat standard breast US supplemented by quantitative SW elastographic examination in this prospective multicenter institutional review board-approved, HIPAA-compliant protocol. B-mode Breast Imaging Reporting and Data System (BI-RADS) features and assessments were recorded. SW elastographic evaluation (mean, maximum, and minimum elasticity of stiffest portion of mass and surrounding tissue; lesion-to-fat elasticity ratio; ratio of SW elastographic-to-B-mode lesion diameter or area; SW elastographic lesion shape and homogeneity) was performed. Qualitative color SW elastographic stiffness was assessed independently. Nine hundred thirty-nine masses were analyzable; 102 BI-RADS category 2 masses were assumed to be benign; reference standard was available for 837 category 3 or higher lesions. Considering BI-RADS category 4a or higher as test positive for malignancy, effect of SW elastographic features on area under the receiver operating characteristic curve (AUC), sensitivity, and specificity after reclassifying category 3 and 4a masses was determined., Results: Median participant age was 50 years; 289 of 939 (30.8%) masses were malignant (median mass size, 12 mm). B-mode BI-RADS AUC was 0.950; eight of 303 (2.6%) BI-RADS category 3 masses, 18 of 193 (9.3%) category 4a lesions, 41 of 97 (42%) category 4b lesions, 42 of 57 (74%) category 4c lesions, and 180 of 187 (96.3%) category 5 lesions were malignant. By using visual color stiffness to selectively upgrade category 3 and lack of stiffness to downgrade category 4a masses, specificity improved from 61.1% (397 of 650) to 78.5% (510 of 650) (P<.001); AUC increased to 0.962 (P=.005). Oval shape on SW elastographic images and quantitative maximum elasticity of 80 kPa (5.2 m/sec) or less improved specificity (69.4% [451 of 650] and 77.4% [503 of 650], P<.001 for both), without significant improvement in sensitivity or AUC., Conclusion: Adding SW elastographic features to BI-RADS feature analysis improved specificity of breast US mass assessment without loss of sensitivity., (© RSNA, 2012)
- Published
- 2012
- Full Text
- View/download PDF
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