Drage Nicholas
Prim Dent J. 2018 Mar 1;7(1):26-30. doi: 10.1308/205016818822610316.
Cone beam computed tomography (CBCT) can be a useful adjunct to conventional plain film radiography, but its use must be carefully justified as the radiation dose is generally higher. Factors affecting the dose include the field of view (FOV) size, the exposure factors, the angle of rotation and voxel size. Once justified, the exposure should be fully optimised to ensure the dose to the patient is kept as low as possible while ensuring there is no reduction in the diagnostic yield. The European Commission (EC) and the Faculty of General Dental Practice (FGDP)(UK) have published selection criteria on the use of CBCT in dentistry. This article provides an overview of CBCT and summarises the latest guidance on selection criteria relevant to the general dental practitioner.
锥形束计算机断层扫描（CBCT）可以作为传统平片放射摄影的有用辅助手段，但由于其辐射剂量通常较高，必须谨慎合理地使用。影响剂量的因素包括视野（FOV）大小、曝光参数、旋转角度和体素大小。一旦确定有必要使用，就应充分优化曝光，以确保在不降低诊断效果的前提下，尽可能降低患者所接受的剂量。欧盟委员会（EC）和英国普通牙科实践学院（FGDP）已经发布了关于牙科中CBCT使用的选择标准。本文概述了CBCT，并总结了与普通牙科医生相关的选择标准的最新指南。
