Yoon W, Jeong Y Y, Kim J K
Department of Radiology, Chonnam National University Hospital, Chonnam National University Medical School, 8 Hak-dong, Dong-gu, Gwangju, 501-757, South Korea.
Abdom Imaging. 2006 Jan-Feb;31(1):1-8. doi: 10.1007/s00261-005-0367-8.
With the introduction of multidetector row computed tomography (MDCT), CT is being considered a potential diagnostic method for patients with acute gastrointestinal (GI) bleeding. On arterial phase MDCT images, active GI bleeding is typically identified as a focal area of high attenuation within the bowel lumen, which represents a collection of contrast material that has been extravasated in association with arterial bleeding. Additional CT findings suggestive of acute GI bleeding are focal dilatation of fluid-filled bowel segment noted on contrast-enhanced CT and acute hematoma on unenhanced CT. In addition to detection of active bleeding, an advantage of contrast-enhanced MDCT is the ability to demonstrate morphologic changes in the GI tract, which could suggest specific conditions that cause acute GI bleeding such as intestinal tumors. Arterial phase contrast-enhanced MDCT is rapid, noninvasive, and accurate in detecting and localizing sites of bleeding in patients with acute GI bleeding. Contrast-enhanced MDCT may be a promising diagnostic option in patients with acute GI bleeding.
随着多排螺旋计算机断层扫描（MDCT）的引入，CT正被视为急性胃肠道（GI）出血患者的一种潜在诊断方法。在动脉期MDCT图像上，活动性GI出血通常表现为肠腔内的一个高衰减灶，这代表了与动脉出血相关的外渗造影剂聚集。CT的其他表现提示急性GI出血的有：在增强CT上可见充满液体的肠段局限性扩张，以及在平扫CT上可见急性血肿。除了检测活动性出血外，增强MDCT的一个优点是能够显示胃肠道的形态学改变，这可能提示导致急性GI出血的特定情况，如肠道肿瘤。动脉期增强MDCT在检测和定位急性GI出血患者的出血部位方面快速、无创且准确。增强MDCT可能是急性GI出血患者一种有前景的诊断选择。
