PT  - JOURNAL ARTICLE
AU  - Powell, T
AU  - Sussman, J G
AU  - Davies-Jones, G A
TI  - MR imaging in acute multiple sclerosis: ringlike appearance in plaques suggesting the presence of paramagnetic free radicals.
DP  - 1992 Nov 01
TA  - American Journal of Neuroradiology
PG  - 1544--1546
VI  - 13
IP  - 6
4099  - http://www.ajnr.org/content/13/6/1544.short
4100  - http://www.ajnr.org/content/13/6/1544.full
SO  - Am. J. Neuroradiol.1992 Nov 01; 13
AB  - MR studies in three patients with multiple sclerosis have shown clearly defined rings within plaques of demyelination, having signal characteristics consistent with the presence of paramagnetic material. It is suggested that these appearances represent the presence of free radicals in the macrophage layer forming the margin of an acute plaque.