Yoshizumi T T, Suneja S K, Teal J S
Department of Radiology, Howard University Hospital, Washington, D.C. 20060.
Radiol Technol. 1989 Jul-Aug;60(6):505-9.
The dose from computed tomography (CT) examinations is not negligible from a radiation safety standpoint. Occasionally, one encounters a case in which an unsuspected pregnant woman undergoes a CT pelvic scan, and the radiologist is required to estimate the dose to the fetus. This article addresses practical methods of CT dosimetry with a specific discussion on fetal dose estimate. Three methods are described: (1) the use of a dose chart, (2) the pencil ionization chamber method, and (3) the thermoluminescence dosimetry (TLD) method.
从辐射安全的角度来看，计算机断层扫描（CT）检查的剂量不可忽视。偶尔会遇到这样的情况，即一名未被怀疑怀孕的女性接受了CT盆腔扫描，放射科医生需要估计胎儿所接受的剂量。本文介绍了CT剂量测定的实用方法，并特别讨论了胎儿剂量估计。文中描述了三种方法：（1）使用剂量图表，（2）铅笔电离室法，以及（3）热释光剂量测定（TLD）法。
