Siddle K J, Sim L H, Case C C
Department of Diagnostic Radiology, Princess Alexandra Hospital, Brisbane.
Australas Radiol. 1990 Nov;34(4):323-5. doi: 10.1111/j.1440-1673.1990.tb02665.x.
A previous study has looked at the estimated radiation dose to the lens of the eye during CT scanning of the orbit, pituitary fossa and brain with a recently installed GE 9800 Quick CT using a phantom simulating the lens of the eye. In this study the same phantom was used to compare the estimated radiation dose delivered to the lens of the eye by three other newly installed CT units of different manufacture. There was significant variation between the doses measured from the four machines when operated with the parameters commonly used in clinical practice. However, in all cases scanning of the phantom using routine techniques delivered a dose to the simulated lens which was much lower than the threshold dose for cataracts. There is, never-the-less, a potential for delivery of much higher doses.
先前有一项研究，使用模拟眼球晶状体的体模，对最近安装的GE 9800快速CT在眼眶、垂体窝和脑部CT扫描期间眼球晶状体的估计辐射剂量进行了研究。在本研究中，使用相同的体模来比较另外三台不同厂家新安装的CT设备对眼球晶状体的估计辐射剂量。当以临床实践中常用的参数操作时，四台机器测量的剂量之间存在显著差异。然而，在所有情况下，使用常规技术对体模进行扫描时，传递给模拟晶状体的剂量远低于白内障的阈值剂量。尽管如此，仍有可能传递更高的剂量。
