Ragozzino M W, Gray J E, Burke T M, Van Lysel M S
AJR Am J Roentgenol. 1981 Oct;137(4):667-71. doi: 10.2214/ajr.137.4.667.
A simple method of estimating fetal absorbed dose from common abdominal and pelvic radiographic examinations is presented. The method uses experimentally determined normalized depth dose curves (rad/Roentgen exposure free-in-air) and sonographic localization of the fetus. The method is useful for estimating fetal absorbed dose when a pregnant woman inadvertently undergoes a radiographic examination. However, its primary value is in minimizing fetal dose when a woman, known to be pregnant, must undergo a radiographic examination. Selection of proper projection and deliberate adjustment of bladder volume can result in significant fetal dose reduction particularly in the critical first trimester.
本文提出了一种从常见的腹部和盆腔X线检查估算胎儿吸收剂量的简单方法。该方法使用实验确定的归一化深度剂量曲线（空气中无散射的拉德/伦琴照射量）和胎儿的超声定位。当孕妇无意中接受X线检查时，该方法有助于估算胎儿吸收剂量。然而，其主要价值在于当已知怀孕的女性必须接受X线检查时，将胎儿剂量降至最低。选择合适的投照方式并有意调整膀胱容积可显著降低胎儿剂量，尤其是在关键的孕早期。
