Figure 1From: Colovesical fistula causing an uncommon reason for failure of computed tomography colonography: a case report (A) Coronal reformatted CT acquired before the CTC shows an obvious colovesical fistula (asterisk). (B,C) After insertion of a Foley catheter and insufflation of air in the rectum, a great quantity of air appeared in the bladder, without colon distensionBack to article page