腰椎成像中体表入射剂量及不同器官剂量的研究。

Investigation of the entrance surface dose and dose to different organs in lumbar spine imaging.

作者信息

Sina S, Zeinali B, Karimipoorfard M, Lotfalizadeh F, Sadeghi M, Zamani E, Faghihi R

机构信息

Radiation Research Center, Shiraz University, Shiraz, Iran.

Nuclear Engineering Department, School of Mechanical Engineering, Shiraz University, Shiraz, Iran.

出版信息

J Biomed Phys Eng. 2014 Dec 15;4(4):119-26. eCollection 2014 Dec.

PMID:25599058

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4289519/

Abstract

BACKGROUND

Dose assessment using proper dosimeters is especially important in radiation protection optimization and imaging justification in diagnostic radiology.

OBJECTIVE

The aim of this study is to obtain the Entrance Skin Dose (ESD) of patients undergoing lumbar spine imaging using two thermoluminescence dosimeters TLD-100 (LiF: Mg, Ti) and GR-200 (LiF: Mg, Cu, P) and also to obtain the absorbed dose to different organs in lumbar spine imaging with several views.

METHODS

To measure the ESD values of the patients undergoing lumbar spine imaging, the two TLD types were put on their skin surface. The ESD values for different views of lumbar spine imaging were also measured by putting the TLDs at the surface of the Rando phantom. Several TLD chips were inserted inside different organs of Rando phantom to measure the absorbed dose to different organs in lumbar spine imaging.

RESULTS

The results indicate that there is a close agreement between the results of the two dosimeters. Based on the results of this experiment, the ESD dose of the 16 patients included in this study varied between 2.71 mGy and 26.29 mGy with the average of 11.89 mGy for TLD-100, and between 2.55 mGy and 27.41 mGy with the average of 12.32 mGy for GR-200 measurements. The ESDs obtained by putting the two types of TLDs at the surface of Rando phantom are in close agreement.

CONCLUSION

According to the results, the GR200 has greater sensitivity than the TLD-100.

摘要

背景

在放射诊断学的辐射防护优化和成像合理性判断中，使用合适的剂量计进行剂量评估尤为重要。

目的

本研究旨在使用两种热释光剂量计TLD - 100（LiF: Mg, Ti）和GR - 200（LiF: Mg, Cu, P）获取腰椎成像患者的体表入射剂量（ESD），并获取腰椎多视角成像时不同器官的吸收剂量。

方法

为测量腰椎成像患者的ESD值，将两种类型的TLD置于患者皮肤表面。通过将TLD置于朗多人体模型表面，也测量了腰椎成像不同视角的ESD值。将多个TLD芯片插入朗多人体模型的不同器官内，以测量腰椎成像时不同器官的吸收剂量。

结果

结果表明两种剂量计的测量结果高度一致。基于本实验结果，本研究纳入的16例患者的ESD剂量，TLD - 100测量值在2.71 mGy至26.29 mGy之间，平均为11.89 mGy；GR - 200测量值在2.55 mGy至27.41 mGy之间，平均为12.32 mGy。将两种类型的TLD置于朗多人体模型表面所获得的ESD值高度一致。