Alukić Erna, Mekiš Nejc
University of Ljubljana, Faculty of Health Sciences, Medical Imaging and Radiotherapy Department, Zdravstvena pot 5, Ljubljana, Slovenia.
Radiat Prot Dosimetry. 2019 Dec 31;186(4):507-512. doi: 10.1093/rpd/ncz057.
The purpose of the research was to determine the effect of the posteroanterior (PA) patient position in lumbar spine imaging on effective dose and the absorbed organ dose. The study was performed on 100 patients that were referred to the lumbar spine radiography that were divided into two equal groups of 50. Body Mass Index, Dose Area Product (DAP), exposure index (EXI), tube time-current (mAs), image field size and the source-patient distance were acquired for each patient. The entrance surface dose (ESD), the effective dose and the absorbed organ doses were calculated. There was no statistically significant difference in the BMI and EXI between the AP and PA projection. The results showed a significant reduction of ESD by 33% and the effective dose by 53% when the PA projection was used. Furthermore, there was a 64% average reduction of the absorbed organ doses to the selected organs.
该研究的目的是确定腰椎成像中患者后前位（PA）对有效剂量和器官吸收剂量的影响。该研究对100名接受腰椎X线摄影的患者进行，这些患者被平均分为两组，每组50人。记录了每位患者的体重指数、剂量面积乘积（DAP）、曝光指数（EXI）、管电流时间（mAs）、图像视野大小和源-患者距离。计算了体表入射剂量（ESD）、有效剂量和器官吸收剂量。前后位（AP）和后前位投影之间的BMI和EXI无统计学显著差异。结果显示，使用后前位投影时，ESD显著降低了33%，有效剂量显著降低了53%。此外，所选器官的器官吸收剂量平均降低了64%。
