[The brain scan and cervical artery lesions. Correlations: clinical-arteriographic-scanning]. / Scanner cérébral et lésions artérielles cervicales. Corrélations: clinique-artériographie-scanner.

Cerebral angiography and CT brain scan are performed on a group of 174 patients (28 asymptomatic patients; 109 patients with symptoms of stroke in relation with a clinically defined vascular territory; 37 patients with symptoms in relation with a clinically uncertain vascular territory). Angiographic findings are: cervical artery lesions in 143 patients, brain artery lesions in 6 patients, both extra and intra cranial artery lesions in 22 patients, and non atheromatous artery lesions in 3 patients. CT brain scan shows: hypodensity in 19 cases, hyperdensity in 1 case, cortical and/or sub cortical atrophy in 141 cases. Only 13 patients have normal CT brain scan. Authors also note: 4 infarction areas in asymptomatic patients and only 4 hypodensities out of 21 cases of internal carotid artery occlusion. Ulcerated cervical artery lesions seem to be the main cause (73%) of cerebral infarction.

[Comparative study of visual evoked potentials and magnetic resonance imaging in multiple sclerosis]. / Etude comparative des potentiels évoqués visuels et de l'imagerie par résonnance magnétique dans la sclérose en plaques.

19 patients with clinically definite, probable or possible multiple sclerosis were examined by means of visual evoked potentials and magnetic resonance imaging. The patients were classified in three groups according to the criteria of Mac Alpine. 11 patients had definite multiple sclerosis: 8 of these patients, who had visual disorders evoking an optic neuropathy, had abnormal visual evoked potentials and 7 of these 8 patients had a pathological magnetic resonance imaging. In the other 3 patients of this group without optic neuropathy. 2 of them had abnormal visual evoked potentials and the 3 had a pathological magnetic resonance imaging. Two patients had probable multiple sclerosis, one of them had abnormal visual evoked potentials and a pathological magnetic resonance imaging. Finally, 6 patients had possible multiple sclerosis, one had a optical neuropathy, with abnormal visual evoked potentials but with a normal magnetic resonance imaging. Among the 5 other patients, 2 had abnormal visual evoked potentials and a pathological magnetic resonance imaging. The results obtained in comparison with the other reported in the literature show that magnetic resonance imaging brings a certain number of criteria which when associated with visual evoked potentials seem to be a further development in the diagnosis of the affection. However, despite of the existence of correlations, the lack of specificity of the lesions found with magnetic resonance imaging should lead the clinicians to a cautions optimism.

[Magnetic resonance imaging in rheumatology]. / Apport de l'imagerie par résonance magnétique en rhumatologie.

The authors report their experience with magnetic resonance imaging in rheumatology, established on more than 250 examinations. The method seems interesting for the study of discal and somatic spine diseases, and especially for the evaluation of tumor extension, the diagnosis of herniated disc, the diagnosis of spondylodiscitis, the exploration of the cervico-occipital joint. As compared to tomodensitometry, this method presents at the same time advantages and drawbacks. Peripherally, magnetic resonance imaging is useful for the exploration of bony tumors and evaluation of their extension. It gives excellent images of the knees and the hips where it seems to improve the results of tomodensitometry and bony scintigraphy in the diagnosis of osteonecrosis. It is likely that advances will broaden the scope of the indications and capabilities of this method.