Fig. 2

A 52-year-old man with a primary central nervous system lymphoma in the cortical gray matter. a. Axial T2WI demonstrates the heterogeneous high signal intensity on the right temporal lobe. b. Contrast-enhanced axial T1WI demonstrates a lesion enhancement. c. A corresponding ADC map shows the tumor with a decreased ADC value (ADC_min = 0.56 × 10^− 3 mm²/s). The ADC_mean value is 0.68 × 10^− 3 mm²/s in the left normal cortical gray matter. d. A correlative color CBV image shows highly elevated perfusion with the calculated rCBV_max of 3.42