An 86-year-old woman with several episodes of bright blood per rectum.
Noncontrast, arterial-phase, and delayed-phase CT images of the abdomen are shown below. Click to enlarge.
1.Active gastrointestinal (GI) bleeding is demonstrated in which of the following vascular territories?
Left hepatic artery 肝左动脉
Middle colic artery 中结肠动脉
Left colic artery 左结肠动脉
Right colic artery 右结肠动脉
2.A lower GI bleed is defined as bleeding originating beyond the ligament of Treitz.
3.Positive oral contrast is routinely administered prior to CT imaging for suspected lower GI bleed.