Gudjónsdóttir Jónína, Ween Borgny, Olsen Dag Rune
Department of Radiography and Biomedical Sciences, Faculty of Medicine, University of Iceland, Reykjavík.
Radiol Technol. 2010 Mar-Apr;81(4):309-17.
Computed tomography (CT) examinations account for a significant portion of individuals' increasing exposure to medical radiation. Automatic exposure control (AEC) was introduced in CT scanners to decrease patient doses while maintaining appropriate image quality.
To identify areas for AEC optimization and suggest practical optimization methods.
A literature review was conducted to assess current knowledge regarding tube current modulation and AEC in CT from peer-reviewed journals and publications from national and international organizations involved in medical imaging and radiation protection.
Four important aspects of AEC use were identified: interaction of user-selectable parameters with AEC, patient positioning and AEC, specific challenges with patient size groups and how to select appropriate input value.
AEC is a useful tool for dose optimization but dose savings are not guaranteed unless the equipment is used properly. Further research is required into optimal use of AEC, particularly for pediatric examinations.
计算机断层扫描（CT）检查在个人日益增加的医疗辐射暴露中占很大比例。CT扫描仪引入了自动曝光控制（AEC），以在保持适当图像质量的同时降低患者剂量。
确定AEC优化的领域并提出实际的优化方法。
进行了一项文献综述，以评估来自参与医学成像和辐射防护的同行评审期刊以及国家和国际组织的出版物中有关CT中管电流调制和AEC的现有知识。
确定了AEC使用的四个重要方面：用户可选择参数与AEC的相互作用、患者定位与AEC、不同患者体型组的特定挑战以及如何选择合适的输入值。
AEC是剂量优化的有用工具，但除非正确使用设备，否则无法保证剂量节省。需要进一步研究AEC的最佳使用方法，尤其是在儿科检查方面。
