Influence of collimation on radiation exposure during chest radiography.

IF 0.8 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Radiation protection dosimetry Pub Date : 2026-09-11 DOI:10.1093/rpd/ncag110

Špela Vičar, Erna Alukić, Laura Jurša, Nejc Mekiš

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引用次数: 0

Abstract

The aim was to assess the impact of collimation on the field of view, dose-area product, effective dose, and absorbed dose to organs located in or near the primary beam. Data were collected using two Siemens radiography units. Imaging was performed under standard clinical protocols in posteroanterior (PA) and lateral projections. Images from 372 patients aged 18 years or older were randomly selected for analysis. For each image, exposure parameters, dose-area product, and field of view were recorded. Based on the field of view, images were classified as optimally or non-optimally collimated. Effective dose and absorbed organ doses were calculated using PCXMC 2.0. With optimal collimation, the field of view was reduced by up to 14.5%, and the dose-area product decreased by 26.6% in the PA projection and 48.4% in the lateral projection. Correspondingly, the effective dose was reduced by 18.3% in PA and 49.1% in lateral projections. Absorbed doses to selected organs decreased by 10%-55.5% in PA and 31.8%-60.9% in lateral projections. The results indicate that collimation is an essential optimization tool that can significantly reduce the patient's dose, thereby lowering the risk of radiation-induced complications.

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胸片中准直对辐射暴露的影响。

目的是评估准直对视场、剂量面积积、有效剂量和吸收剂量对位于主光束或其附近的器官的影响。使用两台西门子x线摄影设备收集数据。在标准临床方案下对后前位（PA）和侧位投影进行成像。随机选择372例18岁及以上患者的图像进行分析。记录每张图像的曝光参数、剂量面积积和视场。基于视场，将图像分为最优准直和非最优准直。使用pcxmc2.0计算有效剂量和吸收器官剂量。在最佳准直条件下，正侧投影的视场缩小了14.5%，剂量面积积减小了26.6%，侧向投影的剂量面积积减小了48.4%。相应的，前列腺癌有效剂量减少18.3%，侧影减少49.1%。所选器官的吸收剂量在正侧部下降10% ~ 55.5%，在侧侧部下降31.8% ~ 60.9%。结果表明准直是一种必要的优化工具，可以显著降低患者的剂量，从而降低辐射引起的并发症的风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation protection dosimetry 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

1.40

自引率

10.00%

发文量

223

审稿时长

6-12 weeks

期刊介绍： Radiation Protection Dosimetry covers all aspects of personal and environmental dosimetry and monitoring, for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring, accident dosimetry, and dosimetry related to the protection of patients. Particular emphasis is placed on papers covering the fundamentals of dosimetry; units, radiation quantities and conversion factors. Papers covering archaeological dating are included only if the fundamental measurement method or technique, such as thermoluminescence, has direct application to personal dosimetry measurements. Papers covering the dosimetric aspects of radon or other naturally occurring radioactive materials and low level radiation are included. Animal experiments and ecological sample measurements are not included unless there is a significant relevant content reason.