中华放射医学与防护杂志

韩军,李勤,曹婷,等.CR在全身照射定位和肺部挡铅的摆位误差[J].中华放射医学与防护杂志,2013,33(3):303-305.HAN Jun,LI Qin,CAO Ting,et al.Set-up error of CR in total body irradiation localization and lung shielding[J].Chin J Radiol Med Prot,2013,33(3):303-305

CR在全身照射定位和肺部挡铅的摆位误差

Set-up error of CR in total body irradiation localization and lung shielding

投稿时间：2012-11-27

DOI：10.3760/cma.j.issn.0254-5098.2013.03.021

中文关键词: 计算机成像技术全身放射治疗图像质量摆位误差

英文关键词:Computed radiography Total body irradiation Image quality Set-up error

基金项目:

作者	单位	E-mail
韩军	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心
李勤	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心	lq20092wh@yahoo.com.cn
曹婷	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心
杨志勇	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心
梁志文	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心
陈秘	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心
魏黎黎	430023 武汉, 华中科技大学同济医学院附属协和医院肿瘤中心

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中文摘要:

目的探讨计算机X射线成像(CR)在全身照射(TBI)定位和肺部挡铅验证中的摆位误差。方法使用TOR 18FG测量其相同条件下kV级和MV级X射线能量的图像质量,建立其临床应用流程,并分析摆位误差。结果在TBI治疗条件下,MV级的X射线图像的低对比度分辨率和空间分辨率远较kV级的差,但可以比较清晰地识别高对比度组织,并应用于TBI治疗。头脚方向误差为:腹背(AP)方向,左肺(0.50±1.65)cm,右肺(1.16±1.56)cm;(背腹)PA方向,左肺(1.12±2.22)cm,右肺(0.41±2.16)cm。左右两侧方向误差为:AP方向,左肺(0.81±1.19)cm,右肺(0.43±1.20)cm;PA方向,左肺(0.31±1.64)cm,右肺(0.55±1.49)cm。结论通过CR的应用,提高了TBI的治疗摆位精度。

英文摘要:

Objective To investigate the set-up error of CR in total body irradiation localization and lung shielding.Methods TOR 18FG software was employed to measure the image quality of images at kV and MV levels. The clinical processes were established and the positioning error was analyzed. Results The low contrast resolution and spatial resolution of MV level images were much worse than those at kV level in the condition of total body irradiation, but the image at MV level could be used to identify the high contrast tissues and employed in total body irradiation. The longitudinal errors were (0.50±1.65)cm for left lung and (1.16±1.56)cm for right lung in AP direction, while (1.12±2.22)cm and (0.41±2.16)cm respectively in PA direction. The errors of lateral were (0.81±1.19)cm for left lung and (0.43±1.20)cm for right lung in AP direction, while (0.31±1.64)cm and (0.55±1.49)cm respectively in PA direction.Conclusions Application of CR in total body irradiation could make positioning in treatment much easily and reduce the localization errors.

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