常规X射线检查患者器官剂量评估的比较研究：体模实验与计算对比

A COMPARATIVE STUDY OF ORGAN DOSES ASSESSMENT FOR PATIENTS UNDERGOING CONVENTIONAL X-RAY EXAMINATIONS: PHANTOM EXPERIMENTS VS. CALCULATIONS.

作者信息

Golikov V, Barkovsky A, Wallstrom E, Cederblad Å

机构信息

St-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev, Mira St. 8, 197101 St-Petersburg, Russian Federation.

Department of Radiology, Trollhättan Hospital-NÄL, SE 46185 Trollhättan, Sweden.

出版信息

Radiat Prot Dosimetry. 2018 Jan 1;178(2):223-234. doi: 10.1093/rpd/ncx102.

DOI:10.1093/rpd/ncx102

PMID:28981902

Abstract

A series of phantom experiments were performed with the aim of estimating organ doses for patients undergoing conventional X-ray chest and pelvis examinations. The experiments were performed using physical phantoms corresponding to an adult and a 5-year-old child. Mean organ doses and entrance surface dose were measured using TL-dosemeters. The measured organ doses were compared with the data obtained by calculations using available software tools (EDEREX and PCXMC 2.0) based on the computational MIRD-5 stylized models. The differences between calculated and measured doses for organs located fully or partly in the primary radiation beam did not exceed ±33% with the probability of 95% for the tube voltage 60-140 kV both for an adult and a 5-year-old child phantom. This study suggests that EDEREX and PCXMC 2.0 can be used to estimate organ and effective dose for adult as well as pediatric patients undergoing conventional X-ray examinations.

摘要

进行了一系列体模实验，目的是估算接受常规胸部和骨盆X线检查的患者的器官剂量。实验使用了分别对应成人和5岁儿童的物理体模。使用热释光剂量计测量平均器官剂量和体表入射剂量。将测量得到的器官剂量与基于MIRD-5计算模型，使用现有软件工具（EDEREX和PCXMC 2.0）计算得到的数据进行比较。对于位于主辐射束内全部或部分的器官，成人和5岁儿童体模在管电压60-140 kV时，计算剂量与测量剂量之间的差异在95%概率下不超过±33%。本研究表明，EDEREX和PCXMC 2.0可用于估算接受常规X线检查的成人及儿童患者的器官剂量和有效剂量。