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. 2020 Sep 3;11:100. doi: 10.1186/s13244-020-00890-7

Fig. 6.

Fig. 6

The peritoneal reflection, when visible, may present with a seagull or V-shaped appearance on the (oblique) axial plane (arrow in a). The sagittal plane is depicted as a hypointense line extending from the rectal wall to the roof of the mesorectal fascia (arrow in b). It is more easily identified whenever there is a small amount of peritoneal effusion, which will accumulate immediately above it (arrow in c)