Rengo Marco, Bellini Davide, De Cecco Carlo N, Osimani Marcello, Vecchietti Fabrizio, Caruso Damiano, Maceroni Marco M, Lucchesi Paola, Iafrate Franco, Paolantonio Pasquale, Ferrari Riccardo, Laghi Andrea
Department of Radiological, Oncological and Pathological Sciences, University of Rome Sapienza, Italy.
Acta Radiol. 2011 Jun 1;52(5):467-72. doi: 10.1258/ar.2011.100499. Epub 2011 Mar 17.
Latest developments of multidetector computed tomography (MDCT), which is today considered a real volumetric technique, have revolutionized abdominal imaging. Technological improvements such as higher spatial resolution, larger volume coverage and higher temporal resolution, have reduced scan times allowing CT studies of the abdomen within a single breath-hold. Furthermore, the increased number of slices, the submillimetric collimation, and the use of multiple dynamic post-contrast phases per single examination, may all contribute to increase the radiation exposure of single patients. The aim of this review is to discuss different parameters affecting contrast media enhancement, as vascular enhancement, parenchymal enhancement and timing, in order to minimize the amount of contrast medium injected and the radiation exposure.
多排螺旋计算机断层扫描（MDCT）如今被视为一种真正的容积技术，其最新进展彻底改变了腹部成像。诸如更高的空间分辨率、更大的容积覆盖范围和更高的时间分辨率等技术改进，缩短了扫描时间，使得能够在一次屏气期间完成腹部CT检查。此外，切片数量的增加、亚毫米级准直以及每次检查使用多个动态对比剂增强期相，都可能导致单个患者的辐射暴露增加。本综述的目的是讨论影响对比剂增强的不同参数，如血管增强、实质增强和时间选择，以便尽量减少对比剂的注射量和辐射暴露。
