FIG 2. rCBF images at three different sections calculated by the I-123 IMP ARG method before the first course of chemotherapy (A), after the first course of chemotherapy (B), 2 hours after the recovery from the left hemiparesis (C), and 2 months before death (D) are shown. The same color scale is used to display quantitative rCBF images through four sequential I-123 IMP SPECT studies.