Figure 2b. Free intraperitoneal fluid after trauma. (a) Contrast-enhanced CT image shows a large volume of high-attenuation free intraperitoneal fluid. A subsequent CT cystogram revealed that most of the fluid was urine leaking from an injured bladder. (b) Contrast-enhanced CT image shows leakage of urine from a bladder rupture at the 1-o’clock position (arrow).