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Abstract
Magnetic resonance imaging is the method of choice for the evaluation of brachial plexopathy. Knowledge of the anatomy and normal imaging appearance is required. High-resolution imaging technique is necessary with the use of adequate coils. Evaluation of the brachial plexus requires T1 weighted sequences in three plans, T2 weighted sequences with fat suppression and if necessary the study is completed with gadolinium injection sequences with fat suppression. A CISS sequence is used if a nerve root avulsion is suspected. The spatial resolution must be optimized with the use of adapted parameters. We illustrate a variety of pathologies that can involve the brachial plexus. The pathology includes trauma, primary (neurogenic tumors, lymphomatosis) or secondary tumors, radiation plexopathy or inflammatory polyneuropathy.
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Wu RH, Bruening R, Ducreux D, Berchtenbreiter C, Jund R, Reiser M. Estimation of relative blood volume in head and neck squamous cell carcinomas. J Neuroradiol 2004; 31:190-7. [PMID: 15356444 DOI: 10.1016/s0150-9861(04)96991-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE MR based first-pass method can be utilized to obtain hemodynamic information in the head and neck region. The purpose of this study was to estimate the regional relative blood volume (rBV) in head and neck tumors, which is useful for tumor staging and tumor biopsy. METHODS Eighteen patients with head and neck tumors (17 squamous cell carcinomas, 1 hemangiopericytoma) were studied on a 1.5-T system. Conventional T1-weighted MR images and T2-weighted images and sequential T2*-weighted images were obtained. During repetitive image sequence acquisition, a bolus (0.2 mmol/kg) of gadopentetate dimeglumine was mechanically injected. Image processing of the dynamic raw data was performed on a pixel-by-pixel basis. RESULTS Regional relative blood volume maps of the head and neck were successfully reconstructed in all (18/18) patients. The regional relative blood volume values within the tumor area of squamous cell carcinoma were 7.0 +/- 2.8, normalized on muscle, whereas the rBV of a single hemangiopericytoma was 11.6. The difference of rBV values of tumor and muscle was highly significant at statistical evaluation (p < 0.001). CONCLUSIONS Relative blood volume imaging of head and neck tumors is valid using MR-based first-pass method. This method provides hemodynamic information which is not available from conventional MR imaging and is promising for further characterization of head and neck tumors
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Riachi S, Marsot-Dupuch K, Ducreux D, Lasjaunias P. P-45 ATM Et oreille externe : rapports anatomiques et corrélations radio-cliniques. J Neuroradiol 2004. [DOI: 10.1016/s0150-9861(04)96974-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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54
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Ducreux D, Facon D, Fillard P, Sarrazin J, Marsot-dupuch K, Petit-lacour M, Benoudiba F, Lasjaunias P. CO-25 Tenseur de diffusion et tracking de fibres des compressions médullaires. J Neuroradiol 2004. [DOI: 10.1016/s0150-9861(04)96912-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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55
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Ducreux D, Attal N, Parker F, Bouhassira D. P-02 IRM fonctionnelle d’activation de patients syringomyéliques allodyniques au froid. J Neuroradiol 2004. [DOI: 10.1016/s0150-9861(04)96931-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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56
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Lacout A, Marsot dupuch K, Ducreux D, Lasjaunias P. CO-24 Étude anatomique du foramen de huschke et importance pathologique. J Neuroradiol 2004. [DOI: 10.1016/s0150-9861(04)96911-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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57
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Ducreux D, Buvat I, Mikulis D, Terbrugge K, Meder J, Bittoun J, Lasjaunias P. CO-20 Apport de l’analyse factorielle dans l’irm de perfusion des malformations artérioveineuses cérébrales. J Neuroradiol 2004. [DOI: 10.1016/s0150-9861(04)96907-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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58
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Agid R, Ducreux D, Halliday WC, Kucharczyk W, terBrugge KG, Mikulis DJ. MR diffusion-weighted imaging in a case of West Nile virus encephalitis. Neurology 2004; 61:1821-3. [PMID: 14694064 DOI: 10.1212/01.wnl.0000099200.58205.ce] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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59
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Ducreux D, Meder JF, Fredy D, Bittoun J, Lasjaunias P. MR perfusion imaging in proliferative angiopathy. Neuroradiology 2004; 46:105-12. [PMID: 14726982 DOI: 10.1007/s00234-003-1045-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2002] [Accepted: 03/20/2003] [Indexed: 12/01/2022]
Abstract
Seizures, which may be the main expression of cerebral arteriovenous malformations (CAVM) can be difficult to control medically. Our goal was to use perfusion-weighted imaging (PWI) in correlation with clinical data to detect abnormal areas of the cerebrum related to a particular type of CAVM (proliferative angiopathy) and to study the pathophysiology. We use PWI, with a bolus injection of contrast medium, to investigate seven patients with proliferative angiopathy and fits producing language disturbance. Perfusion parameters were calculated using the first-pass moment theory. Five patients had perimalformative and/or contralateral abnormal areas with relative hyperperfusion (cerebral blood volume +20.7+/-16.2%, blood flow 92.5+/-68.8 ml/min/100 g). Areas of hypoperfusion and venous congestion were detected in two patients. One patient who underwent MRI after a severe focal deficit had no significant haemodynamic abnormality.
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Ozanne A, Marsot-Dupuch K, Ducreux D, Meyer B, Lasjaunias P. Acute epiglottitis: MRI. Neuroradiology 2004; 46:153-5. [PMID: 14726983 DOI: 10.1007/s00234-003-1094-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2002] [Accepted: 07/18/2003] [Indexed: 10/26/2022]
Abstract
We report the MRI findings in an adult with epiglottitis. There was thickening of the epiglottis and left aryepiglottic fold. Management of this life-threatening condition requires imaging only when the diagnosis is uncertain or when an abscess or other complication is suspected.
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Ducreux D, Wu RH, Mikulis DJ, terBrugge K. Diffusion-weighted imaging and single-voxel MR spectroscopy in a case of malignant cerebral lymphoma. Neuroradiology 2003; 45:865-8. [PMID: 14605786 DOI: 10.1007/s00234-003-1107-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2003] [Accepted: 08/15/2003] [Indexed: 11/25/2022]
Abstract
Since conventional MRI fails to distinguish between the common neoplasm involving the corpus callosum, we explored the utility of diffusion weighted imaging and single-voxel proton spectroscopy in a case of corpus callosum lymphoma.
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Weon YC, Ducreux D, Alvarez H, Lasjaunias P. MR Perfusion Imaging in a Case of a Vein of Galen Malformation with Secondary Capillary Angioectasia. Interv Neuroradiol 2003; 9:57-63. [PMID: 20591304 DOI: 10.1177/159101990300900110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2003] [Accepted: 01/20/2003] [Indexed: 11/17/2022] Open
Abstract
SUMMARY Vein of Galen Aneurysmal Malformations (VAGMs) are uncommon vascular malformations associated with dilatation of the vein of Galen embryonic forerunner with single or multiple direct arteriovenous fistulas within its wall without direct reflux into normal cerebral veins. We describe a patient with a late neurological onset presenting a classic VGAM complicated by secondary thalamic capillary angioectasia imaged with MR perfusion. In our patient, abnormal MR perfusion parameters were not seen on conventional MRI; they probably reflect underlying venous hypertension. They were located in areas involved in motor neurological deficit.
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Lacour-Petit MC, Lozeron P, Ducreux D. MRI of peripheral nerve lesions of the lower limbs. Neuroradiology 2003; 45:166-70. [PMID: 12684721 DOI: 10.1007/s00234-002-0932-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2002] [Accepted: 10/14/2002] [Indexed: 10/20/2022]
Abstract
Our aim is to illustrate the contribution of MRI to diagnosis of lesions of the lower-limb nerve trunks. We report six patients who had clinical and electrophysiological examination for a peroneal or tibial nerve palsy. MRI of the knee showed in three cases a nonenhancing cystic lesion of the peroneal nerve suggesting an intraneural ganglion cyst, confirmed by histological study in one case. One patient with known neurofibromatosis had an enhancing nodular lesion of the peroneal nerve compatible with a neurofibroma. Two patients had diffuse hypertrophy with high signal on T2-weighted images, without contrast enhancement of the sciatic nerve or its branches. These lesions were compatible with localised hypertrophic neuropathy. In one case, biopsy of the superficial branch of the peroneal nerve showed insignificant axonal degeneration. MRI can provide information about the size and site of the abnormal segment of a nerve before treatment and can be used to distinguish different patterns of focal lesion.
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Ducreux D, Marsot-Dupuch K, Lasjaunias P, Oppenheim C, Frédy D. [Lyrical and musical auditive mental imagery in functional MRI]. J Neuroradiol 2003; 30:18-24. [PMID: 12624587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
PURPOSE to explore with functional MRI cerebral areas involved in musical and lyrical sounds signal processing with the mental imagery method. MATERIAL and METHODS nine volunteers (mean age: 27 years old) underwent functional MRI with BOLD contrast at 1.5 T. Box-car paradigms of partial recollections of musical or lyrical memories tasks were performed. Statistical correlations mappings were calculated and superimposed on previously realigned anatomical reference imaging to observe activated cerebral areas. RESULTS all except one subjects had activation areas in primary and secondary auditive cortices in the temporal Heschl gyrus and the Planum Temporale, unilaterally (n=2) or bilaterally (n=6) during both mental tasks. Contralateral activation improvement was observed in 4 cases when the lyrical tasks were performed. Temporal and insular regions involved in language processing were observed in eight of nine subjects. CONCLUSION auditive mental imagery can show in functional MRI cerebral areas involved in auditive functions and some of the areas involved in language processing.
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Ducreux D, Petit-Lacour MC, Marsot-Dupuch K, Bittoun J, Lasjaunias P. Functional MRI in symptomatic proliferative angiopathies. Neuroradiology 2002; 44:883-92. [PMID: 12428121 DOI: 10.1007/s00234-002-0871-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2002] [Accepted: 08/15/2002] [Indexed: 10/27/2022]
Abstract
Seizures, the main expression of cerebral arteriovenous malformations (AVMs) can be difficult to control medically. We studied fMRI in correlation with clinical findings cerebral activation clusters patterns in relation with singular AVMs (proliferative angiopathy). We carried out blood oxygen-level dependent functional MRI (fMRI) in seven patients with language problems due to capillary ectasia with verbal fluency and repetition language tasks in box-car paradigms. fMRI maps were calculated with cross-correlation coefficients and superimposed on brain anatomy. Five patients had perimalformative and/or contralateral areas of ipsi- and contralateral activation clusters redistribution. One patient who underwent fMRI after a severe focal post-ictal deficit had total hemisphere contralateral activation clusters redistribution.
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Ducreux D, Petit-Lacour MC, Marsot-Dupuch K, Bittoun J, Lasjaunias P. MR perfusion imaging in a case of cerebral proliferative angiopathy. Eur Radiol 2002; 12:2717-22. [PMID: 12386762 DOI: 10.1007/s00330-001-1293-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Revised: 11/08/2001] [Accepted: 11/21/2001] [Indexed: 10/25/2022]
Abstract
Proliferative angiopathy is an uncommon type of cerebral arteriovenous shunt characterized by an extensive capillary network with normal brain intermingled and few clinical symptoms (mostly seizures and headaches). This case report depicts an extensive proliferative angiopathy located in the right hemisphere. Its hemodynamic disturbances were studied with MR perfusion imaging (local or remote areas of increased time to peak, decrease ratio of signal, and relative regional cerebral blood volume values).
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Ducreux D, Petit-Lacour MC, Benoudiba F, Castelain V, Marsot-Dupuch K. Diffusion-weighted imaging in a case of wernicke encephalopathy. J Neuroradiol 2002; 29:39-42. [PMID: 11984477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
In a chronic alcoholic patient with progressive confusion, which was consistent with the clinical diagnosis of Wernicke encephalopathy, T2-weighted, FLAIR and diffusion weighted (DWI) MR imaging depicted brain abnormalities located in both medial thalamic nuclei. Apparent Diffusion Coefficient (ADC) measurements in these regions shown unexpected normal values, referring to Wernicke pathological findings and DWI data. DWI may be helpful to diagnose early basal nuclei abnormalities, but may fail to compute ADC values in these locations.
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Ducreux D, Trystram D, Oppenheim C, Godon-Hardy S, Missir O, Meder JF. [Diagnostic imaging of brain arteriovenous malformations]. Neurochirurgie 2001; 47:190-200. [PMID: 11404696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
The goals of the imaging work-up of cerebral arteriovenous malformations are not only the diagnosis of malformations but also their radioanatomic characterization in order to define an appropriate treatment plan for a given lesion, to evaluate and to compare results of treatment modalities, to look for parameters correlated with a high risk of bleeding and to identify indications of radiosurgery. In this review, the diagnostic value of imaging techniques is discussed: CT scan, MR imaging, vascular explorations. Radioanatomic parameters most useful for therapeutic discussion are defined: feeding arteries, associated aneurysms, size and topography of nidus, draining veins.
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Ducreux D, Chevallier P, Perrin C, Jourdan J, Hofman P, Raffaelli C, Padovani B. Pseudomembranous aspergillus bronchitis in a double-lung transplanted patient: unusual radiographic and CT features. Eur Radiol 2001; 10:1547-9. [PMID: 11044922 DOI: 10.1007/s003300000385] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Pseudomembranous aspergillus bronchitis is considered as an early form of invasive pulmonary aspergillosis, a well-known airway infection in immunocompromised patients. Radiologic features concerning invasive aspergillosis of the airways have been reported. However, we describe here an unusual feature of invasive aspergillus bronchitis, never reported to date, observed in a double-lung transplanted patient. Chest radiograph and CT revealed significant peribronchial thickening without any parenchymal involvement.
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Ducreux D, Oppenheim C, Vandamme X, Dormont D, Samson Y, Rancurel G, Cosnard G, Marsault C. Diffusion-weighted imaging patterns of brain damage associated with cerebral venous thrombosis. AJNR Am J Neuroradiol 2001; 22:261-8. [PMID: 11156766 PMCID: PMC7973956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
BACKGROUND AND PURPOSE Apart from cases studies, little is known regarding diffusion-weighted imaging of brain lesions associated with human cerebral venous thrombosis (CVT). Our aim was to describe the initial diffusion-weighted imaging patterns observed in brain areas with MR signal changes associated with CVT and to compare them with those of follow-up imaging. METHODS The cases of nine patients with brain lesions associated with CVT who underwent CT and diffusion-weighted imaging 3 hours to 4 days after sudden neurologic onset were retrospectively reviewed. The apparent diffusion coefficient (ADC) in abnormal brain was compared with that of contralateral normal regions using z score analysis. MR images obtained during 3 to 6 months of follow-up were available for seven patients. RESULTS All patients had nonhemorrhagic T2-hyperintense brain regions. These were associated with partially hemorrhagic areas on the CT scans of four patients. In nonhemorrhagic edematous areas, ADC was heterogeneous (coexistence of increased, normal, or decreased ADC) in five patients and homogeneous in four. In the latter four patients, ADC values were within normal range in three, whereas a large homogeneous hyperintensity with decreased ADC values (0.3-0.4 10(-3)mm2/s, <-3 z scores) was observed in one. When available, follow-up images always showed hemorrhagic sequelae in initially hemorrhagic areas. Nonhemorrhagic edematous areas with initially increased ADC values returned to normal. Initially normal or decreased ADC values were predictive of reversibility, although imaging sequelae were rarely observed. CONCLUSION The diffusion-weighted imaging/ADC pattern of venous stroke is more heterogeneous than previously thought. Large brain regions of reduced ADC values that are not predictive of ultimate infarction in cases of CVT can be observed.
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Ducreux D, Grisot F, Brocq O, Grimaud A. [Disk herniation with posterior ring apophysis fracture in young adults]. JOURNAL DE RADIOLOGIE 1995; 76:209-12. [PMID: 7745556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Fracture of the posterior ring apophysis in association with a herniated disk is unusual in adult patients. It has to be considered as a posterior pre-marginal disk hernia, a variant of marginal cartilaginous nodes. This report concerns one young adult with lumbar and sciatic pain presenting a posterior marginal node with fracture of the posterior ring apophysis and conventional posterior disk herniation. Computed tomographic findings and magnetic resonance images are described.
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