Ragozzino M W, Breckle R, Hill L M, Gray J E
Radiology. 1986 Feb;158(2):513-5. doi: 10.1148/radiology.158.2.3510449.
To estimate fetal absorbed dose from radiographic examinations, the depth from the anterior maternal surface to the midline of the fetal skull and abdomen was measured by ultrasound in 97 pregnant women. The relationships between fetal depth, fetal presentation, and maternal parameters of height, weight, anteroposterior (AP) thickness, gestational age, placental location, and bladder volume were analyzed. Maternal AP thickness (MAP) can be estimated from gestational age, maternal height, and maternal weight. Fetal midskull and abdominal depths were nearly equal. Fetal depth normalized to MAP was independent or nearly independent of maternal parameters and fetal presentation. These data enable a reasonable estimation of absorbed dose to fetal brain, abdomen, and whole body.
为估算放射检查时胎儿的吸收剂量，通过超声测量了97名孕妇自母体前表面至胎儿颅骨和腹部中线的深度。分析了胎儿深度、胎儿胎位与母体身高、体重、前后径厚度、孕周、胎盘位置及膀胱容量等母体参数之间的关系。母体前后径厚度（MAP）可根据孕周、母体身高和母体体重估算得出。胎儿颅骨中部和腹部深度几乎相等。以MAP标准化后的胎儿深度与母体参数和胎儿胎位无关或几乎无关。这些数据有助于合理估算胎儿脑部、腹部和全身的吸收剂量。
