Fig. 9From: Primary central nervous system post-transplant lymphoproliferative disorders: the spectrum of imaging appearances and differentialStreptococcus brain abscesses. T1-weighted image with gadolinium (a) demonstrates multiple lesions with rim enhancement and surrounding vasogenic edema. The central core of the lesions restrict strongly (arrows) on the ADC map (b). The rims are not restricted. CBV map (c) shows mild elevated perfusion in the lesions, but no high perfusion in the surrounding area. Note the T2 hypointense rim (arrows) (d)Back to article page