Kalra Mannudeep K, Naz Nausheen, Rizzo Stefania M R, Blake Michael A
Department of Radiology, Emory University Hospital, Atlanta, GA 30322, USA.
Curr Probl Diagn Radiol. 2005 Sep-Oct;34(5):171-81. doi: 10.1067/j.cpradiol.2005.06.002.
As multi-detector-row computed tomography (CT) technology evolves, manifold applications of CT scanning have been adopted in clinical practice and optimization of scanning protocols to comply with an "as low as reasonably achievable" radiation dose have become more complex. Automatic exposure control techniques, which have been recently introduced on most state-of-the-art CT equipment, aid in radiation dose optimization at a selected image quality. The present article reviews the fundamentals of automatic exposure control techniques in CT, along with the scanning protocols and associated radiation dose reduction.
随着多排探测器计算机断层扫描（CT）技术的发展，CT扫描在临床实践中有了多种应用，并且为符合“尽可能合理低”的辐射剂量而优化扫描协议变得更加复杂。最近在大多数最先进的CT设备上引入的自动曝光控制技术有助于在选定的图像质量下优化辐射剂量。本文综述了CT中自动曝光控制技术的基本原理，以及扫描协议和相关的辐射剂量降低。
