1. Oviduct is located besides of unfix side of ovary that forms a hemicycle around ovary. 输卵管位于卵巢游离缘外侧,呈半圆形围绕着卵巢,输卵管壶腹部弯曲、峡部直;
2. Duodenal diverticulum manifested as hemicycle lesion with gaseous density which had air-fluid level behind pancreatic head with clear border. 憩室表现为胰头右后方半圆形含气体腔影,可有液平,与胰头交界部边缘锐利。
3. Once the aquifer disconnect from the stream, the inverted saturated zone of the rectangular streambed show a hemicycle, and that of rectangular streambed show a vertical rhombus. 当河流与地下水脱节后,矩形河床的悬挂饱水带呈半圆形,三角形河床的悬挂饱水带呈直立菱形。