FIG 2. Axial images in an AIDS patient with toxoplasmosis.

A, Axial T1-weighted gadolinium-enhanced MR image. The lesion in the right basal ganglia has an irregular, enhancing rim.

B, DW image (b = 1000 s/mm²). The core of the lesion demonstrates unrestricted diffusion.

C, ADC map of a toxoplasmosis lesion in the right basal ganglia. The outline indicates the ROI within the lesion used for ADC computation. The core of the lesion has a mean ADC that is increased relative to that in normal white matter (ADC ratio, 2.23).