Söderberg Marcus
Medical Radiation Physics Malmö, Department of Translational Medicine, Skåne University Hospital, Lund University, SE-205 02 Malmö, Sweden
Radiat Prot Dosimetry. 2016 Jun;169(1-4):84-91. doi: 10.1093/rpd/ncv459. Epub 2015 Nov 12.
Today, computed tomography (CT) systems routinely use automatic exposure control (AEC), which modulates the tube current. However, for optimal use, there are several aspects of an AEC system that need to be considered. The purpose of this study was to provide an overview of the Siemens CARE Dose 4D AEC system, discuss practical tips and demonstrate potential pitfalls. Two adult anthropomorphic phantoms were examined using two different Siemens CT systems. When optimising the CT radiation dose and image quality, the projection angle of the localiser, patient centring, protocol selection, scanning direction and the use of protective devices requires special attention.
如今，计算机断层扫描（CT）系统通常使用自动曝光控制（AEC），该系统可调节管电流。然而，为了实现最佳使用效果，AEC系统的几个方面需要加以考虑。本研究的目的是概述西门子CARE Dose 4D AEC系统，讨论实用技巧并展示潜在的陷阱。使用两台不同的西门子CT系统对两个成人仿真人体模型进行了检查。在优化CT辐射剂量和图像质量时，定位器的投影角度、患者定位、协议选择、扫描方向以及防护装置的使用都需要特别注意。
