FIG 1. Illustration of lesion definitions on a representative ADC image at day 0. Lesion on day 0 in black = ADC lesion at day 0; dark gray = lesion growth until day 1 (LG1); pale gray = lesion growth until day 7 (LG7); white = surviving tissue (ST7). LG1 and LG7 were found by surrounding follow-up T2 lesions at day 1 and 7 and transfer onto day 0 PWI images. ST7 is tissue initially showing CBF decrease but without T2 changes at day 7.