Graser Anno, Johnson Thorsten R C, Chandarana Hersh, Macari Michael
Department of Clinical Radiology, University of Munich-Grosshadern Campus, Munich, Germany.
Eur Radiol. 2009 Jan;19(1):13-23. doi: 10.1007/s00330-008-1122-7. Epub 2008 Aug 2.
Dual energy CT (DECT) is a new technique that allows differentiation of materials and tissues based on CT density values derived from two synchronous CT acquisitions at different tube potentials. With the introduction of a new dual source CT system, this technique can now be used routinely in abdominal imaging. Potential clinical applications include evaluation of renal masses, liver lesions, urinary calculi, small bowel, pancreas, and adrenal glands. In CT angiography of abdominal aortic aneurysms, dual energy CT techniques can be used to remove bones from the datasets, and virtual unenhanced images allow differentiation of contrast agent from calcifying thrombus in patients with endovascular stents. This review describes potential applications, practical guidelines, and limitations of dual energy CT in the abdomen.
双能量CT（DECT）是一种新技术，它能够根据在不同管电压下同步进行的两次CT采集所获得的CT密度值来区分物质和组织。随着新型双源CT系统的引入，该技术目前可常规用于腹部成像。潜在的临床应用包括肾肿块、肝脏病变、尿路结石、小肠、胰腺和肾上腺的评估。在腹主动脉瘤的CT血管造影中，双能量CT技术可用于从数据集中去除骨骼，虚拟平扫图像有助于区分血管内支架置入患者体内的造影剂与钙化血栓。本文综述了双能量CT在腹部的潜在应用、实用指南及局限性。
