31 results on '"H, Moulahi"'
Search Results
2. Hydatidose cérébrale
- Author
-
K. Tlili-Graiess, S. Abroug, K. Mrad-Dali, H. Gharbi-Jemni, H. Moulahi, H. Guesmi, H. Krifa, F. El-Ouni, M. Yacoub, and N. Arifa
- Subjects
Gynecology ,Physics ,medicine.medical_specialty ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,medicine ,Radiology, Nuclear Medicine and imaging ,Hydatid cyst ,Computed tomography ,Neurology (clinical) - Abstract
Resume L’hydatidose cerebrale (HC) est tres rare, a l’origine de 2 % des processus expansifs intracrâniens meme en pays d’endemie. Son diagnostic en imagerie repose classiquement sur la tomodensitometrie. L’appreciation de l’impact diagnostique de l’IRM et son role dans la prise en charge de l’HC nous a amene a revoir les aspects en imagerie de 25 cas d’HC colliges durant les 15 dernieres annees explores tous par TDM. 4 ont eu une IRM avec dans un cas des sequences de diffusion et une spectroscopie par resonance magnetique du proton en mode multivoxel bidimensionnel. 19 des 25 patients avaient moins de 16 ans. Tous les kystes etaient sus tentoriels, 22 dans le territoire de l’artere cerebrale moyenne, 2 intraventriculaire et 1 intra aqueducal. 18 kystes etaient solitaires, 23 uniloculaires et 2 multiloculaires avec un perikyste epais et calcifie dans un cas. Les kystes etaient multiples dans 5 cas, uni ou multivesiculaires, de plus petites tailles et sus tentoriels sauf un avec une atteinte associee de la fosse posterieure. La taille moyenne etait de 7,4 cm. L’aspect typique est celui d’une masse kystique, ronde ou ovalaire a contours nets, a parois tres fine, de densite et de signal equivalents a ceux du LCS accompagne d’un important effet de masse (20/25). L’œdeme perilesionnel (2 cas) et le rehaussement parietal (3 cas) sont rares et amenent a tort au diagnostic de tumeurs ou d’abces (2 cas). Bien que la TDM permette le diagnostic de HC dans la tres grande majorite des cas (22/25), l’IRM notamment avec ses multi modalites demontre plus precisement localisation, nombre, paroi, caracteristiques du signal et rehaussement permettant le diagnostic dans les cas atypiques ou compliques et une planification chirurgicale adaptee.
- Published
- 2006
3. IRM de diffusion de l’encéphale : aspect normal, images pièges et artefacts
- Author
-
Catherine Adamsbaum, Olivier Naggara, Sebastian Rodrigo, A. Bertrand, S. Pierrefitte, H. Moulahi, Catherine Oppenheim, S Patsoura, and J.-F. Meder
- Subjects
Echo-planar imaging ,Radiological and Ultrasound Technology ,business.industry ,Computer science ,Diffusion imaging ,Rapid acquisition ,Neuroimaging ,Radiology, Nuclear Medicine and imaging ,Computer vision ,Imaging technique ,Artificial intelligence ,business ,Nuclear medicine ,Diffusion MRI - Abstract
Owing to its rapid acquisition time and high sensitivity, diffusion-weighted imaging has turned into a routine sequence for brain imaging. This is the case not only for stroke, but also for various diseases such as abscesses or tumors. Being aware of the artifacts is important for optimal interpretation. After a brief review of the normal patterns, the most frequent artifacts, inherent to the echoplanar imaging technique, are described and we provide suggestions to avoid them. Most current traps are caused by T2-weighting of the diffusion images; the key for avoiding erroneous interpretation relies on the ADC map.
- Published
- 2006
4. Imagerie des cérébellites aiguës chez l’enfant
- Author
-
H. Jemni Gharbi, M. Mhiri Souei, M. Essoussi, M. Yacoub, K. Tlili-Graiess, H. Moulahi, N. Arifa, and B. Mlaiki
- Subjects
medicine.medical_specialty ,Ataxia ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,Fluid-attenuated inversion recovery ,medicine ,Vomiting ,Etiology ,Radiology, Nuclear Medicine and imaging ,Cerebellar atrophy ,Neurology (clinical) ,Radiology ,medicine.symptom ,Abnormality ,business ,Paresis - Abstract
Acute cerebellitis is one of the main causes of acute cerebellar dysfunction in children. It is either infectious, usually viral, post-infectious or post vaccinal in etiology. Diagnosing acute cerebellitis may be difficult in patients with only subtle cerebellar signs and when cerebro-spinal fluid examination is normal. MRI is the most adequate imaging technique to demonstrate cerebellar involvement. The authors report the clinical and neuro-imaging findings in 4 paediatric cases. Patient's age varied from 2 to 7 years and predominant clinical symptoms were fever, headache and vomiting; ataxia was noted only in 2 cases. Viral serologic tests were negative in 3 cases and demonstrated Epstein-Barr virus in 1. Initial MRI examination (2 cases) demonstrated increased intensity on T2W and Flair sequences of the cerebellar gray matter with pial enhancement. Clinical outcome was good with complete resolution of symptoms in 3 cases and persistent mild right upper limb paresis in one. The resolution of the signal abnormality was well demonstrated on MRI in one case, suggesting an inflammatory etiology with moderate residual cerebellar atrophy.
- Published
- 2006
5. Imagerie par résonance magnétique du gangliogliome desmoplastique infantile cérébral : à propos d'un cas
- Author
-
I. Hasni Bouraoui, M. Souei Mhiri, K. Mrad Dali, Moncef Mokni, N. Arifa Achour, H. Moulahi, K. Tlili-Graiess, and H. Krifa
- Subjects
Mural Nodule ,medicine.medical_specialty ,Contrast enhancement ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,Histology ,Desmoplastic infantile ganglioglioma ,medicine.disease ,Ganglioglioma ,Glioma ,Pediatrics, Perinatology and Child Health ,Medicine ,Radiology ,Good prognosis ,business - Abstract
Desmoplastic infantile ganglioglioma is a rare intracranial tumor of infancy, characterized by solid and cystic component, voluminous size and supratentorial location. These tumors are diagnosed usually below the age of 2 years. We report 1 case of desmoplastic ganglioglioma in 13-year-old male. Computed tomography and magnetic resonance imaging diagnosed supratentorial mixed cystic and solid tumor, which presented as a large cystic component with intense contrast enhancement of a mural nodule. The tumor was surgically removed, and histology revealed desmoplastic ganglioglioma. The patient had a good follow up. This observation emphasizes the possibility of desmoplastic ganglioglioma in older infants. It mustn't be considered as a specific entity of very young age infant and must be recognized in older infant because it may be misdiagnosed as malignant glioma. Despite the pseudo malignant appearance, these tumors have a good prognosis after surgery and when excision is complete they don't led to recurrences.
- Published
- 2006
6. Fiche n° 3 : Dissection des artères cervicales
- Author
-
H. Moulahi, Olivier Naggara, Myriam Edjlali, J.-F. Meder, M.-P. Gobin Metheil, and Catherine Oppenheim
- Subjects
business.industry ,Medicine ,Radiology, Nuclear Medicine and imaging ,business - Published
- 2005
7. Fiche n° 2 : Imagerie des démences
- Author
-
M Raynal, J.-F. Meder, H. Moulahi, S Rodrigo, and Olivier Naggara
- Subjects
business.industry ,Medicine ,Radiology, Nuclear Medicine and imaging ,business - Published
- 2005
8. [Cerebral hydatid disease: imaging features]
- Author
-
K, Tlili-Graiess, F, El-Ouni, H, Gharbi-Jemni, N, Arifa, H, Moulahi, K, Mrad-Dali, H, Guesmi, S, Abroug, M, Yacoub, and H, Krifa
- Subjects
Adult ,Male ,Brain Diseases ,Adolescent ,Echinococcosis ,Child, Preschool ,Humans ,Female ,Middle Aged ,Child ,Tomography, X-Ray Computed ,Magnetic Resonance Imaging ,Retrospective Studies - Abstract
Cerebral hytatid cysts (HC) are extremely rare, forming 2% of all intra cranial space occupying lesions even in counties where the disease is endemic. HC diagnosis is usually based on a pathognomonic computed tomography (CT) pattern. In order to assess the value of MR we reviewed the CT (n=25) and magnetic resonance (MR, n=4 including diffusion and proton magnetic resonance spectroscopy in 1) imaging of 25 patients with pathologically confirmed cerebral hydatid disease. 19 HC were seen in children under 16 years. All were supra tentorial with 22 in the middle cerebral artery territory. HC was solitary in 18 cases, unilocular in 23 and multi-vesicular in 2 with heavily calcified pericyst in 1. 2 cysts were intra ventricular and 1 intra aqueducal. The most typical features were well defined, smooth thin walled spherical or oval cystic lesions of CSF density and/or signal with considerable mass effect (20/25). Surrounding oedema with complete or incomplete rim enhancement was seen in 3 cases which were labelled as complicated and/or infected cysts. Although CT is diagnostic of hydatid disease in almost all cases (22/25), MRI including diffusion and spectroscopy precisely demonstrate location, number, cyst capsule, type of signal and enhancement and allows diagnosis of atypical or complicated HC and appears more helpful in surgical planning.
- Published
- 2007
9. [Diffusion-weighted imaging of the brain: normal patterns, traps and artifacts]
- Author
-
A, Bertrand, C, Oppenheim, H, Moulahi, O, Naggara, S, Rodrigo, S, Patsoura, C, Adamsbaum, S, Pierrefitte, and J F, Meder
- Subjects
Diffusion Magnetic Resonance Imaging ,Brain ,Humans ,Artifacts - Abstract
Owing to its rapid acquisition time and high sensitivity, diffusion-weighted imaging has turned into a routine sequence for brain imaging. This is the case not only for stroke, but also for various diseases such as abscesses or tumors. Being aware of the artifacts is important for optimal interpretation. After a brief review of the normal patterns, the most frequent artifacts, inherent to the echoplanar imaging technique, are described and we provide suggestions to avoid them. Most current traps are caused by T2-weighting of the diffusion images; the key for avoiding erroneous interpretation relies on the ADC map.
- Published
- 2007
10. [Imaging of acute cerebellitis in children. Report of 4 cases]
- Author
-
K, Tlili-Graiess, M, Mhiri Souei, B, Mlaiki, N, Arifa, H, Moulahi, H, Jemni Gharbi, M, Yacoub, and M, Essoussi
- Subjects
Male ,Radiography ,Cerebellar Diseases ,Child, Preschool ,Acute Disease ,Encephalitis ,Humans ,Female ,Child - Abstract
Acute cerebellitis is one of the main causes of acute cerebellar dysfunction in children. It is either infectious, usually viral, post-infectious or post vaccinal in etiology. Diagnosing acute cerebellitis may be difficult in patients with only subtle cerebellar signs and when cerebro-spinal fluid examination is normal. MRI is the most adequate imaging technique to demonstrate cerebellar involvement. The authors report the clinical and neuro-imaging findings in 4 paediatric cases. Patient's age varied from 2 to 7 years and predominant clinical symptoms were fever, headache and vomiting; ataxia was noted only in 2 cases. Viral serologic tests were negative in 3 cases and demonstrated Epstein-Barr virus in 1. Initial MRI examination (2 cases) demonstrated increased intensity on T2W and Flair sequences of the cerebellar gray matter with pial enhancement. Clinical outcome was good with complete resolution of symptoms in 3 cases and persistent mild right upper limb paresis in one. The resolution of the signal abnormality was well demonstrated on MRI in one case, suggesting an inflammatory etiology with moderate residual cerebellar atrophy.
- Published
- 2006
11. [Magnetic resonance imaging features of desmoplastic cerebral ganglioglioma of infancy: report of 1 case]
- Author
-
M, Souei Mhiri, N, Arifa Achour, H, Moulahi, I, Hasni Bouraoui, K, Mrad Dali, M, Mokni, H, Krifa, and K, Tlili-Graiess
- Subjects
Male ,Motor Skills Disorders ,Adolescent ,Brain Neoplasms ,Humans ,Intracranial Hypertension ,Tomography, X-Ray Computed ,Magnetic Resonance Imaging ,Ganglioglioma - Abstract
Desmoplastic infantile ganglioglioma is a rare intracranial tumor of infancy, characterized by solid and cystic component, voluminous size and supratentorial location. These tumors are diagnosed usually below the age of 2 years. We report 1 case of desmoplastic ganglioglioma in 13-year-old male. Computed tomography and magnetic resonance imaging diagnosed supratentorial mixed cystic and solid tumor, which presented as a large cystic component with intense contrast enhancement of a mural nodule. The tumor was surgically removed, and histology revealed desmoplastic ganglioglioma. The patient had a good follow up. This observation emphasizes the possibility of desmoplastic ganglioglioma in older infants. It mustn't be considered as a specific entity of very young age infant and must be recognized in older infant because it may be misdiagnosed as malignant glioma. Despite the pseudo malignant appearance, these tumors have a good prognosis after surgery and when excision is complete they don't led to recurrences.
- Published
- 2004
12. Rhabdomyosarcome de la tête et du cou chez l’enfant
- Author
-
S. Omezzine, K. Tlili-Graiess, H. Moulahi, H. Hamza, A. Aissa, and H. Krifa
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging ,Neurology (clinical) - Published
- 2008
13. THO21 Imagerie de l’amylose respiratoire. A propos de 10 cas
- Author
-
Hilario Nunes, E. Hamaied, H. Moulahi, Pierre-Yves Brillet, F. Landino, M Kambouchner, Dominique Valeyre, Michel Brauner, and E. Maissiat
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs L’amylose est secondaire au depot extracellulaire d’une proteine anormale. L’atteinte du systeme respiratoire est observee dans 50 % des cas, soit dans le cadre d’une maladie pulmonaire systemique soit par production locale de substance amyloide, essentiellement de type AL. L’objectif de ce travail est d’illustrer les differents aspects TDM de l’atteinte respiratoire. Materiels et methodes Les examens TDM de dix patients (femme/homme : 2/8, âge moyen : 56 ans), atteints d’amylose respiratoire et explores dans notre centre, ont ete retrospectivement analyses. Neuf patients etaient symptomatiques : toux (n = 4), dyspnee (n = 8), hemoptysie (n = 1), pneumopathie infectieuse (n = 3). Une confirmation histologique etait obtenue dans tous les cas soit par biopsie bronchique (n = 6), exerese chirurgicale (n = 2) ou videothoracoscopie (n = 2). Resultats L’amylose tracheobronchique (n = 2) est caracterisee par un epaississement circonferentiel des voies aeriennes proximales, qui peut etre associe a un retrecissement luminal responsable d’une obstruction d’aval. L’atteinte nodulaire (n = 3) est caracterisee par une localisation sous-pleurale de nodule(s) lobule(s) pouvant etre calcifie(s) au centre. L’atteinte interstitielle diffuse (n = 2) est caracterisee par des lignes septales et non-septales associees a du verre depoli. L’association de plusieurs atteintes est possible (n = 3). Conclusion Les localisations respiratoires de l’amylose sont de diagnostic difficile qui peut etre evoque devant certains aspects TDM evocateurs.
- Published
- 2005
14. NR31 Evaluation d’une nouvelle technique d’ARM dynamique 3D tricks
- Author
-
M. Petkova, J.Y. Gauvrit, D. Trystram, F. Nataf, S. Godon-Hardy, H. Moulahi, C. Oppenheim, and J.F. Méder
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Published
- 2005
15. Intérêt du couple imagerie de diffusion et spectroscopie par résonance magnétique dans le diagnostic des métastases cérébrales solitaires
- Author
-
Nadia Mama, S. Yahyaoui, I. Hasni, M. Ladib, and H. Moulahi
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging ,Neurology (clinical) - Published
- 2012
16. Apport de la diffusion et de la spectroscopie par résonance magnétique dans l’approche histologique des lésions extra-axiales
- Author
-
K. Mrad Dali, Nadia Mama, F. Elouni, M. Ladib, H. Moulahi, and A. Ben Abdallah
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging ,Neurology (clinical) - Published
- 2012
17. Apport des séquences de diffusion et de spectroscopie par résonance magnétique dans le diagnostic des leucodystrophies
- Author
-
K. Mrad Dali, Nadia Mama, L Boughamoura, H. Moulahi, F. Elouni, H. Sboui, Mehdi Gaha, N. Souyah, and K. Tlili
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging ,Neurology (clinical) - Published
- 2012
18. NRP-WS-3 Imagerie des tumeurs cerebrales de l’enfant
- Author
-
I. Ksira, Moncef Mokni, A. Aissa, H. Moulahi, H. Jemni, A. Abid, W. Gamaoun, K. Tlili Graies, and I. Hasni Bouraoui
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Preciser l’apport de la TDM et de l’IRM dans le diagnostic des tumeurs cerebrales de l’enfant en insistant sur les precisions qu’apportent les nouvelles techniques d’imagerie (spectroscopie et diffusion). Materiels et methodes Serie pediatrique retrospective de 28 cas durant 5 ans (2003 a 2007). La TDM et l’IRM cerebrales etaient realisees essentiellement pour des signes d’hypertension intracrânienne, convulsions ou anomalies staturo-pubertaires. La TDM etait realisee dans 27 cas et l’IRM dans 24 cas. Tous les patients etaient operes avec une confirmation histologique. Resultats Les principaux aspects de tumeurs cerebrales de l’enfant seront presentes. Il s’agissait, a l’etage sous-tentoriel, de : 7 astrocytomes pilocytiques, 2 astrocytomes fibrillaires, 2 ependymomes, 3 medulloblastomes, 1 hemangioblastome. A l’etage sus-tentoriel : 3 glioblastomes, 2 craniopharyngiomes, 2 ependymomes, 1 gangliogliome, 1 medulloepitheliome, 1 pinealoblastome, 1 xantoastrocytome, 1 kyste arachnoidien, 1 tumeur neurog1ia1e maligne. Une correlation positive entre l’imagerie et les resultats anatomo-pathologiques etait retrouvee dans 5 cas sur 15 a l’etage sous-tentoriel : 4 astrocytomes pilocytiques et 1 ependymome, et dans 6 cas sur 13 a l’etage sus-tensoriel : 2 craniopharyngiomes, 2 tumeurs neurogliales, 1 pinealoblastome et 1 kyste arachnoidien. Conclusion L’IRM represente l’examen de choix pour explorer la fosse posterieure et les lesions de la ligne mediane. Couplee a la TDM, elle explore mieux les tumeurs hemispheriques. La TDM trouvera aussi sa place pour la detection des calcifications tumorales pour mieux caracteriser certaines tumeurs.
- Published
- 2008
19. OA-WS-56 Apport de l’IRM dans le bilan pre-operatoire de la scoliose de l’enfant
- Author
-
W. Gamaoun, I. Hasni Bouraoui, N. Arifa, A. Daadoucha, H. Moulahi, H. Jemni, C. Ferjani, K. Mrad-Dali, and K. Tlili Graies
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Preciser les indications et l’apport de l’IRM dans l’exploration de la scoliose de l’enfant. Materiels et methodes Trente-neuf cas de scoliose explores par IRM sont colliges durant une periode de 4 ans (2004-2007). La scoliose etait isolee (5 cas), s’associait a une douleur rachidienne (8 cas), des signes neurologiques (5 cas), un torticolis (3 cas), un retard psychomoteur (1 cas), une malformation vertebrale (4 cas), des antecedents de mal de Pott (1 cas) et elle rentrait dans le cadre d’un syndrome polymalformatif (4 cas) et a une maladie de Van Recklinghausen (3 cas). Resultats L’IRM a elimine une anomalie vertebro-medullaire associee a la scoliose dans 18 cas. Elle a montre une malformation vertebrale (9 cas), une malformation de Chiari (3 cas), une diatematomyelie (4 cas), une myelomeningocele (1 cas), une moelle attachee basse ( 1 cas), une maladie de Scheuermann (2 cas), des anomalies rentrant dans le cadre d’une neurofibromatose (2 cas). Conclusion L’IRM est indispensable pour l’etude de la totalite de l’axe medullaire pour toutes les scolioses graves relevant d’un traitement chirurgical ou s’accompagnant de signes neurologiques. Sa realisation, actuellement plus large, a reduit le nombre de scolioses idiopathiques en montrant des causes neurologiques infra-cliniques.
- Published
- 2008
20. Schwannomes intramédullaires à propos de trois cas
- Author
-
I. Alibi, A. Daadoucha, M. Ladib, K. Tlili-Graiess, and H. Moulahi
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging ,Neurology (clinical) - Published
- 2008
21. NRP8 Imagerie des craniopharyngiomes : aspects en imagerie par resonance magnetique conventionnelle, diffusion et en spectroscopie
- Author
-
Hela Jemni, H. Moulahi, I. Mejri, N. Arifa, M. Chaieb, H. Jmal, and K. Tlili-Graiess
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Analyser, a travers 3 dossiers radio-cliniques d’enfants atteints de crâniopharyngiomes, l’apport diagnostique des sequences de diffusion (DIF) et de spectroscopie par resonance magnetique (SRM) par rapport aux sequences IRM conventionnelles. Materiels et methodes Trois cas ont ete colliges entre 1999 et 2005 et explores par TDM et IRM cerebrale. SRM et DIF ont ete realisees dans 2 cas et la confirmation histologique obtenue dans 2 cas. Resultats Trois filles âgees entre 6 et 11 ans etaient explorees pour syndrome polyuro-polydipsique. A la TDM l’aspect etait typique a triple composante : kystique, charnue avec calcifications (1 cas) et moins evocateur avec uniquement une composante solide (2 cas). L’IRM a confirme la nature kystique et charnue (hyposignal Tl, hypersignal T2 heterogene) avec important rehaussement (1 cas). Dans les 2 autres cas, les masses solides etaient en hyposignal Tl-hypersignal T2 heterogene avec des calcifications en hyposignaux punctiformes en EG (1 cas), en hypersignal en diffusion avec un ADC bas a b = 1000mm2/s (2cas). La spectroscopie a objective un large pic lipidique pathognomonique dans les 2 cas. Conclusion Les crâniopharyngiomes se presentent typiquement comme des masses supra-sellaires a triple composante. La TDM associee a l’IRM aboutissent souvent au diagnostic positif. L’avenement de nouvelles modalites en IRM telles que la DIF et la SRM fournissent des donnees supplementaires et permettent le diagnostic differentiel quand l’une des composantes manque.
- Published
- 2006
22. NR36 Pieges et artefacts en IRM de diffusion
- Author
-
M. Petkova, S. Godon-Hardy, H. Moulahi, F. Brami-Zylberberg, J.-F. Meder, Olivier Naggara, and Catherine Oppenheim
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Presenter les aspects normaux de l’encephale en sequence de diffusion ainsi que les images pieges normales et pathologiques et comprendre leur origine. Expliquer l’origine des artefacts lies a la technique employee et discuter des solutions possibles pour les identifier ou les supprimer. Materiels et methodes Illustration a partir d’images de diffusion selectionnees issue de la banque de donnees d’un departement de Neuro-imagerie utilisant cette technique en routine. Resultats Apres un rappel simplifie des parametres contribuant a la formation du signal et des facteurs de qualite de l’image propres a l’imagerie de diffusion, nous illustrerons successivement l’aspect normal de l’encephale en diffusion, les images pieges liees essentiellement a la ponderation T2. Les artefacts suivants seront detailles : courants de Foucault, effet de susceptibilite magnetique, images fantomes en N/2, deplacement chimique, mouvements, artefacts dus a l’utilisation d’antenne multicanaux. Conclusion La connaissance des images pieges normales et pathologiques ainsi que des artefacts en imagerie de diffusion permet d’eviter les erreurs diagnostiques.
- Published
- 2005
23. NR37 Guide d’interpretation de l’ARM 3D temps de vol des arteres intracraniennes
- Author
-
J.L. Guarneiri, H. Moulahi, J.P. Pruvo, Denis Trystram, J.-F. Meder, Jean-Yves Gauvrit, and S. Godon-Hardy
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Proposer un outil pedagogique permettant une initiation et un perfectionnement de l’interpretation de l’ARM temps de vol (3D TOF) des arteres intracrâniennes. Materiels et methodes Des explorations normales et les observations cliniques les plus significatives ont ete recueillies afin d’illustrer un guide d’apprentissage interactif. Resultats Le guide est organise en cinq parties, consacrees : 1) aux problemes techniques et modes de reconstructions ; 2) a l’anatomie normale et aux variantes anatomiques habituellement rencontrees (hypoplasies et agenesies, persistance d’anastomoses embryonnaires, reseau de suppleance) ; 3) a l’expose d’un schema de lecture systematisee ; 4) aux pieges diagnostiques ; 5) et a la semiologie des pathologies les plus frequentes (stenose, occlusion, anevrisme, spasme, dissection, malformation et fistule arterioveineuses). Conclusion L’ARM temps de vol est une technique d’examen quotidienne. Elle fait partie des protocoles d’exploration proposes devant des motifs de consultation extremement frequents tels que les cephalees, les syndromes meninges et les deficits neurologiques. La lecture systematisee de cet examen est indispensable pour le diagnostic des affections neurovasculaires et le bilan des lesions de la base du crâne.
- Published
- 2005
24. Evaluation d’une nouvelle technique d’ARM dynamique 3D TRICKS
- Author
-
Denis Trystram, S. Godon-Hardy, M. Petkova, J.-F. Meder, Jean-Yves Gauvrit, H. Moulahi, F. Nataf, and Catherine Oppenheim
- Subjects
Radiological and Ultrasound Technology ,Radiology, Nuclear Medicine and imaging - Abstract
Objectifs Evaluer une nouvelle technique d’ARM dynamique 3D TRICKS (time-resolved imaging of contast kinetics) dans l’exploration des lesions vasculaires intracrâniennes. Materiels et methodes Dix-huit patients (malformations arterioveineuses cerebrales n = 17, fistule arterioveineuse durale n = 1) ont ete explores par ARM dynamique 3D TRICKS. L’examen a ete compare aux donnees de l’angiographie numerisee (n = 18) et de l’ARM dynamique 3D ASSET (array spatial sensitivity encoding technique), (n = 9). La sequence d’ARM 3D TRICKS est effectuee apres injection de chelate de Gadolinium avec une acquisition des images toutes les 0,8 secondes, la sequence ASSET-toutes les 1,8 secondes. Les parametres suivants ont ete etudies : nombres de phases arterielles, nombre et type d’arteres et de veines, taille du nidus pour les malformations arterioveineuses (MAV). La taille du nidus des MAV est comprise entre 0,5 et 6 cm. Resultats Par rapport a l’ARM dynamique 3D ASSET, la resolution temporelle et l’appreciation de la taille du nidus sont superieures, l’etude du drainage veineux est comparable. Par rapport a l’angiographie numerisee, l’appreciation des afferences est moins exhaustive. Conclusion L’ARM dynamique 3D TRICKS presente une resolution temporelle et spatiale meilleure que la sequence ASSET et sensiblement equivalente a l’angiographie numerisee pour l’etude du nidus et des veines de drainage.
- Published
- 2005
25. Infratentorial oligodendroglioma in a child: a case report and review of the literature.
- Author
-
Ouni FE, Gaha M, Moulahi H, Daadoucha A, Krifa H, and Tlili K
- Subjects
- Brain diagnostic imaging, Brain pathology, Child, Humans, Hydrocephalus etiology, Infratentorial Neoplasms pathology, Magnetic Resonance Imaging, Male, Nervous System Diseases etiology, Neurologic Examination, Oligodendroglioma pathology, Tomography, X-Ray Computed, Treatment Outcome, Infratentorial Neoplasms surgery, Oligodendroglioma surgery
- Abstract
Oligodendrogliomas are the tumors of normal glial cells of brain called oligodendrocytes. They represent a small proportion of childhood brain tumors and are infrequently encountered in the posterior fossa. CT scan and MRI are very helpful for the preoperative management of oligodendrogliomas. However, due to the rarity and non-specific imaging features, it may be difficult to differentiate oligodendroglioma from astrocytoma especially in an infratentorial location. The short- and long-term outcome and the exact treatment protocol of posterior fossa oligodendroglioma is yet to be established. We report a rare case of an oligodendroglioma of the vermis in an 8-year-old female with a brief review of the literature.
- Published
- 2012
- Full Text
- View/download PDF
26. Primary dural lymphoma with vault involvement mimicking meningioma.
- Author
-
Hasni Bouraoui I, Ladib M, Moulahi H, Kadri K, Mama N, Ksira I, Mokni M, Krifa H, and Tlili Graiess K
- Subjects
- Adult, Diagnosis, Differential, Humans, Male, Meningeal Neoplasms pathology, Meningioma pathology, Brain pathology, Dura Mater pathology, Lymphoma pathology, Magnetic Resonance Imaging
- Published
- 2011
- Full Text
- View/download PDF
27. [Diffusion-weighted imaging of the brain: normal patterns, traps and artifacts].
- Author
-
Bertrand A, Oppenheim C, Moulahi H, Naggara O, Rodrigo S, Patsoura S, Adamsbaum C, Pierrefitte S, and Meder JF
- Subjects
- Humans, Artifacts, Brain anatomy & histology, Diffusion Magnetic Resonance Imaging
- Abstract
Owing to its rapid acquisition time and high sensitivity, diffusion-weighted imaging has turned into a routine sequence for brain imaging. This is the case not only for stroke, but also for various diseases such as abscesses or tumors. Being aware of the artifacts is important for optimal interpretation. After a brief review of the normal patterns, the most frequent artifacts, inherent to the echoplanar imaging technique, are described and we provide suggestions to avoid them. Most current traps are caused by T2-weighting of the diffusion images; the key for avoiding erroneous interpretation relies on the ADC map.
- Published
- 2006
- Full Text
- View/download PDF
28. [Cerebral hydatid disease: imaging features].
- Author
-
Tlili-Graiess K, El-Ouni F, Gharbi-Jemni H, Arifa N, Moulahi H, Mrad-Dali K, Guesmi H, Abroug S, Yacoub M, and Krifa H
- Subjects
- Adolescent, Adult, Child, Child, Preschool, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Retrospective Studies, Tomography, X-Ray Computed, Brain Diseases diagnosis, Brain Diseases parasitology, Echinococcosis diagnostic imaging, Echinococcosis pathology
- Abstract
Cerebral hytatid cysts (HC) are extremely rare, forming 2% of all intra cranial space occupying lesions even in counties where the disease is endemic. HC diagnosis is usually based on a pathognomonic computed tomography (CT) pattern. In order to assess the value of MR we reviewed the CT (n=25) and magnetic resonance (MR, n=4 including diffusion and proton magnetic resonance spectroscopy in 1) imaging of 25 patients with pathologically confirmed cerebral hydatid disease. 19 HC were seen in children under 16 years. All were supra tentorial with 22 in the middle cerebral artery territory. HC was solitary in 18 cases, unilocular in 23 and multi-vesicular in 2 with heavily calcified pericyst in 1. 2 cysts were intra ventricular and 1 intra aqueducal. The most typical features were well defined, smooth thin walled spherical or oval cystic lesions of CSF density and/or signal with considerable mass effect (20/25). Surrounding oedema with complete or incomplete rim enhancement was seen in 3 cases which were labelled as complicated and/or infected cysts. Although CT is diagnostic of hydatid disease in almost all cases (22/25), MRI including diffusion and spectroscopy precisely demonstrate location, number, cyst capsule, type of signal and enhancement and allows diagnosis of atypical or complicated HC and appears more helpful in surgical planning.
- Published
- 2006
- Full Text
- View/download PDF
29. [Imaging of acute cerebellitis in children. Report of 4 cases].
- Author
-
Tlili-Graiess K, Mhiri Souei M, Mlaiki B, Arifa N, Moulahi H, Jemni Gharbi H, Yacoub M, and Essoussi M
- Subjects
- Acute Disease, Child, Child, Preschool, Female, Humans, Male, Radiography, Cerebellar Diseases diagnostic imaging, Cerebellar Diseases pathology, Encephalitis diagnostic imaging, Encephalitis pathology
- Abstract
Acute cerebellitis is one of the main causes of acute cerebellar dysfunction in children. It is either infectious, usually viral, post-infectious or post vaccinal in etiology. Diagnosing acute cerebellitis may be difficult in patients with only subtle cerebellar signs and when cerebro-spinal fluid examination is normal. MRI is the most adequate imaging technique to demonstrate cerebellar involvement. The authors report the clinical and neuro-imaging findings in 4 paediatric cases. Patient's age varied from 2 to 7 years and predominant clinical symptoms were fever, headache and vomiting; ataxia was noted only in 2 cases. Viral serologic tests were negative in 3 cases and demonstrated Epstein-Barr virus in 1. Initial MRI examination (2 cases) demonstrated increased intensity on T2W and Flair sequences of the cerebellar gray matter with pial enhancement. Clinical outcome was good with complete resolution of symptoms in 3 cases and persistent mild right upper limb paresis in one. The resolution of the signal abnormality was well demonstrated on MRI in one case, suggesting an inflammatory etiology with moderate residual cerebellar atrophy.
- Published
- 2006
- Full Text
- View/download PDF
30. [Magnetic resonance imaging features of desmoplastic cerebral ganglioglioma of infancy: report of 1 case].
- Author
-
Souei Mhiri M, Arifa Achour N, Moulahi H, Hasni Bouraoui I, Mrad Dali K, Mokni M, Krifa H, and Tlili-Graiess K
- Subjects
- Adolescent, Brain Neoplasms surgery, Ganglioglioma surgery, Humans, Intracranial Hypertension etiology, Magnetic Resonance Imaging, Male, Motor Skills Disorders etiology, Tomography, X-Ray Computed, Brain Neoplasms diagnosis, Ganglioglioma diagnosis
- Abstract
Desmoplastic infantile ganglioglioma is a rare intracranial tumor of infancy, characterized by solid and cystic component, voluminous size and supratentorial location. These tumors are diagnosed usually below the age of 2 years. We report 1 case of desmoplastic ganglioglioma in 13-year-old male. Computed tomography and magnetic resonance imaging diagnosed supratentorial mixed cystic and solid tumor, which presented as a large cystic component with intense contrast enhancement of a mural nodule. The tumor was surgically removed, and histology revealed desmoplastic ganglioglioma. The patient had a good follow up. This observation emphasizes the possibility of desmoplastic ganglioglioma in older infants. It mustn't be considered as a specific entity of very young age infant and must be recognized in older infant because it may be misdiagnosed as malignant glioma. Despite the pseudo malignant appearance, these tumors have a good prognosis after surgery and when excision is complete they don't led to recurrences.
- Published
- 2006
- Full Text
- View/download PDF
31. CT findings in severe thoracic sarcoidosis.
- Author
-
Hennebicque AS, Nunes H, Brillet PY, Moulahi H, Valeyre D, and Brauner MW
- Subjects
- Humans, Sarcoidosis complications, Thoracic Diseases etiology, Sarcoidosis diagnostic imaging, Thoracic Diseases diagnostic imaging, Tomography, X-Ray Computed methods
- Abstract
Severe thoracic sarcoidosis includes manifestations with significant clinical and functional impairment and a risk of mortality. Severe thoracic sarcoidosis can take on various clinical presentations and is associated with increased morbidity. The purpose of this article was to describe the CT findings in severe thoracic sarcoidosis and to explain some of their mechanisms. Subacute respiratory insufficiency is a rare and early complication due to a high profusion of pulmonary lesions. Chronic respiratory insufficiency due to pulmonary fibrosis is a frequent and late complication. Three main CT patterns are identified: bronchial distortion, honeycombing and linear opacities. CT can be helpful in diagnosing some mechanisms of central airway obstruction such as bronchial distortion due to pulmonary fibrosis or an extrinsic bronchial compression by enlarged lymph nodes. An intrinsic narrowing of the bronchial wall by endobronchial granulomatous lesions may be suggested by CT when it shows evidence of bronchial mural thickening. Pulmonary hypertension usually occurs in patients with end-stage pulmonary disease and is related to fibrotic destruction of the distal capillary bed and to the resultant chronic hypoxemia. Several other mechanisms may contribute to the development of pulmonary hypertension including extrinsic compression of major pulmonary arteries by enlarged lymph nodes and secondary pulmonary veno-occlusive disease. Aspergilloma colonization of a cavity is the main cause of hemoptysis in sarcoidosis. Other rare causes are bronchiesctasis, necrotizing bronchial aspergillosis, semi-invasive pulmonary aspergillosis, erosion of a pulmonary artery due to a necrotic sarcoidosis lesion, necrosis of parenchymal sarcoidosis lesions and specific endobronchial macroscopic lesions.
- Published
- 2005
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.