13. Female pelvis MRI, midsagittal plane

This patient's uterus is anteverted (angled anteriorly relative to the long axis of the vagina) and anteflexed (the uterine body tips anteriorly relative to the position of the cervix), resulting in an indentation on the dome of the urinary bladder.

The peritoneum (not distinctly visualized here) covers the dome of the urinary bladder and then reflects onto the uterine fundus and body, forming the vesico-uterine pouch. It extends over the dorsal apsect of the uterus and upper vagina, and reflects onto the rectum, forming the recto-uterine pouch (of Douglas). The urethra, vagina, and anal canal each penetrate the urogenital diaphragm to reach the perineum.

On MRI, the lumens of the urethra, vagina, and anus usually are not visualized distinctly.