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Fig. 1D. —Depiction of perfusion MRI technique for evaluation of
cerebral abscesses in 44-year-old man with two confluent rim-enhancing
lesions. At biopsy, lesions were shown to be due to Nocardia
organisms. Ratio of relative cerebral blood volume (rCBV) in abscess capsule
to rCBV in white matter was 0.78. Unsmoothed version of image shown in
C that focuses on right frontal lobe mass shows regions of interest
(ROIs), each of which was placed within 1 pixel in rim-enhancing portion of
lesion.
