13 results on '"Privat C"'
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2. Angioscanner hélicoïdal de l’aorte abdominale
- Author
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T. Chahid, Jean-Marc Garcier, E. Lipiecka, Privat C, Louis Boyer, A. Alfidja, Anne Ravel, and P. Bourlet
- Subjects
medicine.medical_specialty ,Aorta ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,Vascular disease ,business.industry ,Abdominal aorta ,medicine.disease ,Dissection ,medicine.anatomical_structure ,Aneurysm ,medicine.artery ,Angiography ,cardiovascular system ,medicine ,Abdomen ,Radiology, Nuclear Medicine and imaging ,Tomography ,Radiology ,business - Abstract
The purpose was to illustrate that single or multirow spiral CT angiography has become the main modality for the examination of the abdominal aorta. Our multidisciplinary group investigates weekly 15 abdominal aortas, with a single slice spiral CT since 1995, and a 4 row detector spiral CT since 1999. CT scans protocols and parameters optimization for the 2 CT systems are described. Indications and results of CT to investigate the various abdominal aortic diseases are illustrated and discussed: aneurisms (pretherapeutic staging, selection of indications of endovascular stent-grafting); obstructive aorto-arteriopathies (pretherapeutic staging, follow up after endovascular revascularization); dissection (diagnosis, pretherapeutic staging, follow up); inflammatory diseases; normal patterns and principal complications after surgery. Situations where multislice CT is superior to single slice CT and compared advantages of MRI are discussed. CT is at the present time the main technique to image abdominal aorta. Multislice CT is especially interesting to explore the whole aorta, poly traumatisms, and to plan and follow up endovascular treatments.
- Published
- 2005
3. [Helical CT of abdominal aorta].
- Author
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Bourlet P, Garcier JM, Alfidja A, Lipiecka E, Chahid T, Privat C, Ravel A, and Boyer L
- Subjects
- Aortic Dissection diagnostic imaging, Aorta, Abdominal, Aortic Aneurysm, Abdominal diagnostic imaging, Aortic Aneurysm, Abdominal surgery, Humans, Aortic Diseases diagnostic imaging, Tomography, Spiral Computed
- Abstract
The purpose was to illustrate that single or multirow spiral CT angiography has become the main modality for the examination of the abdominal aorta. Our multidisciplinary group investigates weekly 15 abdominal aortas, with a single slice spiral CT since 1995, and a 4 row detector spiral CT since 1999. CT scans protocols and parameters optimization for the 2 CT systems are described. Indications and results of CT to investigate the various abdominal aortic diseases are illustrated and discussed: aneurisms (pretherapeutic staging, selection of indications of endovascular stent-grafting); obstructive aorto-arteriopathies (pretherapeutic staging, follow up after endovascular revascularization); dissection (diagnosis, pretherapeutic staging, follow up); inflammatory diseases; normal patterns and principal complications after surgery. Situations where multislice CT is superior to single slice CT and compared advantages of MRI are discussed. CT is at the present time the main technique to image abdominal aorta. Multislice CT is especially interesting to explore the whole aorta, poly traumatisms, and to plan and follow up endovascular treatments.
- Published
- 2005
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4. [Cost efficiency study of lacrimal canal obstruction treatment].
- Author
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Gerbaud L, Chiambaretta F, Desrumeaux H, Privat C, Doz M, Menerath JM, Guichard C, Garcier JM, and Boyer L
- Subjects
- Aged, Ambulatory Care economics, Ambulatory Care methods, Analysis of Variance, Cost-Benefit Analysis, Direct Service Costs statistics & numerical data, Endoscopy adverse effects, Female, Hospital Costs statistics & numerical data, Hospitalization economics, Humans, Male, Middle Aged, Models, Econometric, Retrospective Studies, Stents economics, Treatment Outcome, Dacryocystorhinostomy adverse effects, Dacryocystorhinostomy economics, Dacryocystorhinostomy methods, Endoscopy economics, Endoscopy methods, Health Care Costs statistics & numerical data
- Abstract
Objective: To compare three methods used to clear the lacrimal canal., Patients and Methods: A total of 32 files (20 for the dacryocysto-rhinostomy by endoscopic way, 5 for the dacryocysto-rhinostomy by external way and 7 cases of percutaneous stenting) were reviewed. For each, costs of performed interventions were reviewed. An average of the total cost per patient was calculated for all three methods and was then correlated to the initial efficiency of the method., Results: Results show that the average cost for stenting is up to 1,366.80 EUR, for the endoscopic way is up to 2 001.53 EUR and for the external way is up to 2,220.46 EUR. ANOVA (Analysis of Variance) gives significant results when comparing stent to endoscopic way (p=0.000007) and to the external way (p =0.02). The analysis of sensitivity concerning the success rate of various treatments shows that the stent was potentially the most cost-effective and that a failure rate of 35.1% is rather acceptable by comparison to the endoscopic method. If the stent is considered as an outpatient intervention, then, a failure rate of 50% is acceptable., Conclusion: If the failure rate stays under 35.1%, the stent may be considered as a short-term cost-effective method.
- Published
- 2003
5. [Idiopathic epiphoras in adults treated with lacrymal-nasal stents].
- Author
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Privat C, Garcier JM, Chiambaretta F, Menerath JM, Ravel A, and Boyer L
- Subjects
- Adult, Angiography, Digital Subtraction, Humans, Lacrimal Duct Obstruction diagnosis, Lacrimal Duct Obstruction etiology, Polyurethanes, Tomography, X-Ray Computed, Treatment Outcome, Fluoroscopy methods, Lacrimal Duct Obstruction therapy, Radiography, Interventional methods, Stents
- Abstract
Fluoroscopic nonsurgical placement of an expandable polyurethane stent is less invasive than surgery for the treatment of epiphora due to obstruction of the nasolacrimal duct. It needs to be performed with the collaboration of an ophthalmologist, using a high resolution digital subtraction imaging unit.
- Published
- 2003
6. [CT dacryography without selective lacrimal duct catheterization: review of 39 patients].
- Author
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Garcier JM, Napon M, Chiambaretta F, Mofid R, Chahid T, Lipiecka E, Privat C, Ravel A, and Boyer L
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Catheterization, Child, Child, Preschool, Contrast Media, Dacryocystorhinostomy, False Positive Reactions, Female, Humans, Lacrimal Duct Obstruction etiology, Male, Middle Aged, Patient Selection, Sensitivity and Specificity, Sex Characteristics, Sex Distribution, Tomography, X-Ray Computed standards, Lacrimal Duct Obstruction diagnostic imaging, Tomography, X-Ray Computed methods
- Abstract
Objectives: Dacryographies and CT dacryographies are usually performed after catheterization of a lacrimal canaliculus. We evaluated the quality of opacification on CT scan after simple instillation of contrast medium, without any catheterization., Patients and Methods: 39 patients (78 nasolacrimal ducts) were examined for lacrimal pathways obstruction by CT scan after instillation of diluted contrast medium. Additional CT scan imaging was performed after catheterization when the first study did not provide adequate opacification., Results: CT dacryography after instillation is a well tolerated technique. In our study, it allowed detection of all pathologic lacrimal ducts; 7 normal lacrimal pathways (after catheterization) were not opacified after instillation (false positives). The sensitivity of the method was 100%, its specificity 84%., Conclusion: CT dacryography after instillation is a physiologic, simple and sensitive method to evaluate lacrimal obstruction. We propose it as a first step, catheterization being used only in the absence of opacification after instillation.
- Published
- 2002
7. [Quid? Intestinal invagination].
- Author
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Courthaliac C, Mansoor O, Privat C, Ravel A, Lescure G, Kémény JL, and Boyer L
- Subjects
- Adult, Bradycardia etiology, Diagnosis, Differential, Female, Heart Arrest, Humans, Hypothermia etiology, Ileal Diseases complications, Intussusception complications, Ileal Diseases diagnostic imaging, Intussusception diagnostic imaging, Tomography, X-Ray Computed methods
- Published
- 2001
8. [Comparative assessment of helical CT-angiography, 2D TOF MR-angiography and 3D gadolinium enhanced MRA in aorto-iliac occlusive disease].
- Author
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Bourlet P, De Fraissinnette B, Garcier JM, Lipiecka E, Privat C, Ravel A, Franconi JM, and Boyer L
- Subjects
- Adult, Aged, Female, Humans, Male, Middle Aged, Aortic Diseases diagnosis, Arteriosclerosis diagnosis, Gadolinium, Iliac Artery, Magnetic Resonance Angiography methods, Tomography, X-Ray Computed methods
- Abstract
Purpose: To compare helical CT-angiography (CTA) and two techniques of MR angiography (MRA) to conventional angiography in aorto-iliac occlusive disease., Materials and Methods: The abdominal aorta and iliac arteries in 22 patients (4 for preoperative assessment of abdominal aortic aneurysm and 18 for peripheral vascular disease) were imaged using four techniques: digital subtraction angiography ("gold standard"), 2D TOF MR angiography, 3D Gd-enhanced MR angiography and helical CT angiography. Source (CTA and 2D TOF MRA) and MIPed images (after subtraction measures before and after gadolinium injection for 3D Gd-MRA) were reviewed., Results: Sensitivity, specificity and accuracy for the detection of significant (>50%) stenosis and occlusion of aorto-iliac arteries were respectively: 38%, 89%, 77% for 2D TOF MRA; 75%, 71%, 72% for 3D Gd-MRA and 95%, 90%, 92% for CTA. Excluding the internal iliac arteries, results were 54%, 96%, 88% for 2D TOF MRA; 96%, 80%, 83% for 3D Gd-MRA and 92%, 93%, 95% for CTA., Conclusion: 3D Gd-MRA, a technique with potential for further improvement, is superior to 2D TOF MRA for detecting significant stenosis and occlusion of aorto-iliac arteries. Results at Gd-MRA are nearly similar to those at CTA (after excluding internal iliac arteries). Results at Gd-MRA are not affected by calcified plaque.
- Published
- 2000
9. [Chronic hematic cyst of the orbit (orbital subperiosteal hematoma)].
- Author
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Privat C, Bellamy J, Courthaliac C, Kinn T, Ravel A, Mondie J, Bacin F, and Boyer L
- Subjects
- Aged, Chronic Disease, Humans, Magnetic Resonance Imaging, Male, Tomography, X-Ray Computed, Cysts complications, Cysts diagnosis, Hemorrhage complications, Hemorrhage diagnosis, Orbital Diseases complications, Orbital Diseases diagnosis
- Abstract
A case of chronic hematic cyst of the orbit which caused unilateral globe displacement with painful diplopia is described in a 72-year-old man. CT scans showed an extraconal soft tissue mass located between the orbital roof and the superior rectus muscle with a bone lysis. Characteristic appearance on MRI (benign signs, subperiosteal localization of the hematoma) has been confirmed by removal surgery. Chronic hematic cyst of the orbit is uncommon and MRI is helpful to establish this diagnostic.
- Published
- 2000
10. [Pituitary gland MRI and Cushing disease: report of 14 operated patients].
- Author
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Vest-Courtalon C, Ravel A, Perez N, Privat C, Blanc C, Thieblot P, Viallet J, and Boyer L
- Subjects
- Adult, Female, Humans, Middle Aged, Cushing Syndrome pathology, Cushing Syndrome surgery, Magnetic Resonance Imaging, Pituitary Gland pathology
- Abstract
Purpose: Evaluate the MR sensibility for detection and localisation of ACTH-secreting microadenomas of the pituitary gland., Patients: and method. The MRI studies of the pituitary gland, performed before transsphenoidal surgical exploration, about 14 patients who present clinical and biological signs of Cushing disease, were reviewed retrospectively. We have always used unenhanced sagittal and coronal spin-echo T1 sequences, and coronal T1 after injection of gadolinium (1 Tesla)., Results: The global sensibility for detection of an adenoma was 100% (84 to 92% when the lesional localisation was considered). The injection of gadolinium increased the sensibility of 38 to 42% according the readers. 7 to 14% of the lesions were isointense after injection. The estimation of lesional size after injection was the nearer to the surgical results. The indirect sign most frequently seen (35.7 to 64.3%) was focal bulging of the sellar diaphragm. The only differences between the different radiologists, statistically significant, concerned the lesional size before injection and location of the lesion in the sagittal plane., Conclusion: This study confirmed the good sensibility of contrast-enhanced MRI in detection of ACTH-secreting microadenomas. The anatomo-radiological correlations are nevertheless incomplete.
- Published
- 2000
11. [What is it? Interpretation: an aneurysm of a coronary-pulmonary fistula demonstrated by computed tomography].
- Author
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Hetmaniak Y, Lipiecka E, Privat C, Perez N, Ravel A, Lipiecki J, and Boyer L
- Subjects
- Coronary Angiography, Humans, Male, Middle Aged, Pulmonary Artery diagnostic imaging, Aneurysm diagnostic imaging, Arterio-Arterial Fistula diagnostic imaging, Coronary Aneurysm diagnostic imaging, Coronary Vessels pathology, Pulmonary Artery pathology, Tomography, X-Ray Computed
- Published
- 2000
12. [Radio-anatomic study of the angle of origin of dysplastic renal arteries].
- Author
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Garcier JM, Macheda B, Therre T, Privat C, Perez N, Ravel A, Viallet JF, Vanneuville G, and Boyer L
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Angiography, Digital Subtraction, Angioplasty, Balloon, Coronary, Aorta, Abdominal diagnostic imaging, Case-Control Studies, Child, Female, Humans, Male, Middle Aged, Renal Artery Obstruction congenital, Renal Artery Obstruction pathology, Renal Artery Obstruction therapy, Retrospective Studies, Fibromuscular Dysplasia diagnostic imaging, Renal Artery abnormalities, Renal Artery diagnostic imaging, Renal Artery Obstruction diagnostic imaging
- Abstract
Purpose: To compare the angulation at the origin of dysplastic renal arteries compared to atherosclerotic renal arteries, in order to improve the technique for percutaneous transluminal angioplasty of FMD., Materials and Methods: Retrospective analysis of 40 aortograms in patients who underwent renal angioplasty for dysplastic stenosis, with comparison with 45 control aortograms (with or without atherosclerotic lesions of the renal arteries). The angle of implantation of the renal arteries was measured relative to the aortic axis in the frontal plane, taking into account only the angulation of its proximal segment. We identified three types of kidneys with regard to their position relative to the renal artery ostium., Results: The angle of implantation of dysplastic renal arteries is significantly sharper compared with the control group (63.8 degrees vs 80.9 degrees, p = 0.0001), irrespective of the side. The angulation did not correlate with the position of the kidney or the direction of the renal artery, suggesting a congenital origin., Conclusion: The angle of implantation of the dysplastic renal arteries relative to the aortic axis in the frontal plane is sharper than the angle measured in non dysplastic renal arteries.
- Published
- 1999
13. [What is it? A narrow long-isthmus aortic coarctation with significant collateral circulation].
- Author
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Perez N, Dauphin C, Legault B, Garcier JM, Privat C, Ravel A, Camilleri L, Lusson JR, and Boyer L
- Subjects
- Aortic Coarctation diagnostic imaging, Aortic Coarctation physiopathology, Child, Collateral Circulation physiology, Contrast Media, Follow-Up Studies, Gadolinium, Humans, Male, Aortic Coarctation diagnosis, Magnetic Resonance Imaging, Tomography, X-Ray Computed
- Published
- 1999
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