American Journal of Neuroradiology, Vol 14, Issue 1 145-154, Copyright © 1993 by American Society of Neuroradiology
ARTICLES |
Midsagittal MR measurements of the corpus callosum in healthy subjects and diseased patients: a prospective survey
JP Laissy, B Patrux, C Duchateau, D Hannequin, P Hugonet, H Ait-Yahia and J Thiebot
Department of Radiology, Bichat University Hospital, Paris, France.
PURPOSE: To determine quantitatively a possible corpus callosum (CC) involvement in normal aging and white matter diseases. METHODS: Midsagittal size and signal of CC were recorded prospectively from 243 routine MR brain examinations. A midline internal skull surface (MISS) and subcutaneous fat signal intensity were measured to calculate CC/MISS and CC/fat ratios. Four groups of subjects were studied: 124 apparently healthy subjects, 45 patients with multiple sclerosis, 13 patients with a noncerebral cancer under chemotherapy, and 37 AIDS patients. RESULTS: Mean surface area of CC in controls was 6.36 cm2. It was significantly larger in men than in women (P < .05), but CC/MISS ratio was not. Elderly controls > 70 years and AIDS patients displayed significant CC atrophy, as well as multiple sclerosis subjects with long-standing disease or with a severe chronic progressive form. CONCLUSION: CC substance loss identification should not be based on visual inspection or on absolute area, but by means of a CC/MISS ratio.
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