[en] Regional blood flow and Regional metabolic rate of oxygen of 41 brain tumors were measured using Positron Emission Tomography(PET) and Oxgen-15. 1) Blood flow; Meningioma were not uniform. Glioblastoma were almost low, but in a few case involving small high blood flow area. Astrocytoma were low. Oligodendroglioma were high and medium mixed. Metastatic tumor were all low. 2) Oxygen utilization; Any tumor were almost low. We discussed these results with reference to histology and others. (author)