Modified virtual colonoscopy: A noninvasive technique for the diagnosis of rectovaginal septum and deep infiltrating pelvic endometriosis

In this study, we modified the standard virtual colonoscopy technique to diagnose deep infiltrating pelvic endometriosis. The following modifications were used: (1) insertion of a large obstetric tampon high into the vagina; (2) insertion of a Foley catheter into the rectum and insufflation with CO2; and (3) scanning only the pelvis. We used a Toshiba Aquillion 64-multidetector computed tomography scanner coupled to a 3-D workstation. By employing various reconstruction modules such as endo-luminal fly-through, cubed volume, 2-D multiplanar reconstruction, 3-D transparent view, and 3-D volume-rendered and maximum intensity projection, we were able to demonstrate deep infiltrating pelvic endometriosis in bowel, urinary tract, and rectovaginal and retroperitoneal spaces.