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.