This study aims to compare the effect of obtaining the anteroposterior scout view (APSV) with that of the posteroanterior scout view (PASV) on mammary gland dose in pediatric patients during different tube voltages. We used a pediatric anthropomorphic phantom with a 64 detector-row computed tomography (CT) scanner using the APSV or PASV protocol of the chest. A real-time skin dosimeter was placed on the scanner gantry and pasted onto the phantom surfaces of the right and left mammary glands. We compared the real-time skin dosimeter values in the right and left mammary glands between the APSV and PASV protocols at different tube voltages. Compared with APSV, it is possible to reduce the exposure dose by approximately 80% using PASV at different tube voltages (p < 0.05). Obtaining the PASV at 80, 100, and 120 kVp was useful in reducing the mammary gland dose by approximately 80% in pediatric patients compared with obtaining the APSV without deteriorating the image quality of the main scan.

本研究旨在比较不同管电压下获得前后侦察视图 (APSV) 与后前侦察视图 (PASV) 对儿科患者乳腺剂量的影响。我们使用了一个儿科拟人模型，配有 64 排探测器计算机断层扫描 (CT) 扫描仪，采用胸部 APSV 或 PASV 协议。将实时皮肤剂量计放置在扫描仪机架上并粘贴到左右乳腺的模型表面上。我们比较了 APSV 和 PASV 协议在不同管电压下左右乳腺的实时皮肤剂量计值。与 APSV 相比，在不同管电压下使用 PASV 可以减少约 80% 的曝光剂量（p  < 0.05）。与获取 APSV 相比，在 80、100 和 120 kVp 下获取 PASV 可将儿科患者的乳腺剂量减少约 80%，且不会降低主扫描的图像质量。