Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Semarang, Central Java, Indonesia.
Department of Applied Physics and Medical Imaging, California State University Channel Islands, Camarillo, CA 93012, USA.
Radiat Prot Dosimetry. 2021 Nov 12;196(3-4):248-256. doi: 10.1093/rpd/ncab144.
The study aims to correlate the effective diameter (Deff) and water-equivalent diameter (Dw) parameters with anterior-posterior (AP), lateral (LAT) and AP + LAT dimensions in order to estimate the patient dose in head CT examinations. Seventy-four patient datasets from head CT examinations were retrospectively collected. The patient's sizes were calculated from the middle slice using a software of IndoseCT. Dw and Deff were plotted as functions of AP, LAT and AP + LAT dimensions. The best trendline fit for LAT and AP functions was a second order polynomial, which resulted in R2 of 0.89 for Deff vs LAT, 0.88 for Dw vs LAT, 0.92 for Deff vs AP and 0.91 for Dw vs AP. A linear correlation was found for Deff vs AP + LAT, Dw vs AP + LAT and Dw vs Deff with R2 of 0.97, 0.96 and 0.98, respectively.
本研究旨在将有效直径（Deff）和水等效直径（Dw）参数与前后（AP）、侧向（LAT）和 AP+LAT 尺寸相关联，以便估算头部 CT 检查中的患者剂量。回顾性收集了 74 例头部 CT 检查的患者数据集。使用 IndoseCT 软件从中层计算患者的大小。绘制 Dw 和 Deff 作为 AP、LAT 和 AP+LAT 尺寸的函数。LAT 和 AP 函数的最佳趋势线拟合是二次多项式，Deff 与 LAT 的 R2 为 0.89，Dw 与 LAT 的 R2 为 0.88，Deff 与 AP 的 R2 为 0.92，Dw 与 AP 的 R2 为 0.91。Deff 与 AP+LAT、Dw 与 AP+LAT 和 Dw 与 Deff 之间存在线性相关，R2 分别为 0.97、0.96 和 0.98。
