Cerebral cortical lesions in multiple sclerosis detected by MR imaging at 8 Tesla.
OBJECTIVE
Conventional imaging of ex-vivo brain at 1.5T in multiple sclerosis (MS) detects only a small fraction of the gray matter cerebral cortical lesions that can be detected by pathology. Our purpose was to examine if imaging at 8T can detect plaques in cortical gray matter (CGM) not evident at 1.5T.


METHODS
An ex-vivo brain obtained at autopsy from a patient with MS was formalin fixed and 1 cm coronal slices were examined using MR imaging at 8T.


RESULTS
Numerous cerebral cortical lesions not evident at 1.5T were seen at 8T. Lesions were easily identified using gradient-echo and spin-echo (SE) as well as diffusion images. MR imaging at 8T identified many of the types of plaques previously evident only by pathology. The magnitude of the cortical involvement in this 1 patient was severe. Lesions in the gray matter readily visible by high-field MR imaging were sometimes barely visible by pathology. MR imaging at 8T often facilitated the detection of such plaques by pathology.


CONCLUSIONS
This study establishes the utility of high-field imaging at 8T in the delineation of plaques in the cerebral CGM in MS.
Kangarlu
A
A
Department of Radiology, The Ohio State University College of Medicine, Columbus, Ohio, USA.
Bourekas
E C
EC
Ray-Chaudhury
A
A
Rammohan
K W
KW
D000328:Adult; D002540:Cerebral Cortex / Q000473:pathology*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D009103:Multiple Sclerosis / Q000473:pathology*