Fig. 3

Region of interest of ASL perfusion in a 41-year-old patient with fibroid. The fibroid was subserosal-mural type arising from uterine posterior wall. ROI①: right uterine posterior wall beneath the fibroid, ROI②: left uterine posterior wall beneath the fibroid, ROI③: uterine anterior wall, ROI④: uterine anterior wall, and gluteus muscle. We defined ROI① and ROI② as fibroid positive side, and ROI③ and ROI④ as fibroid negative side. ASL perfusion indexes were calculated as ASL value in uterus—ASL value in gluteus muscle