低熔点适形铅挡块的制作方法与误差分析  

Making method and error analysis of low melting-point lead block

作　　者：安安[1] 

机构地区：[1]河南省商丘市第一人民医院放疗科,河南商丘476100

出　　处：《转化医学电子杂志》2014年第6期18-19,共2页E-Journal of Translational Medicine

摘　　要：目的：探讨低熔点适形铅挡块的制作方法及误差产生的原因，提出完善质量保证和质量控制的方法。方法：模拟定位机上拍患者定位片，医生勾画靶区后利用热丝切割机切割形状后制作铅挡，然后在模拟定位机下进行拍片验证，合格后方可实施治疗，结合验证结果，对挡块出现不同的误差进行分析和评价。结果：每个挡块之间都存在不同程度的误差，制作的每一个环节都直接影响成模的质量，避免这些环节出现差错，才能使误差降到最小。结论：用低熔点铅制作适形铅挡是目前常规放疗中行之有效的好方法，它不仅符合放射治疗计划的设计要求，而且提高了放射治疗的精确度。但需要做好质量控制，才能保证挡块的质量。AIM：To investigate making method of low meltingpoint lead block and find causes of error,in order to improve the quality assurance and quality control.METHODS：The patient positioning chip shot were taken on the simulator machine,doctors drew the outline target shape and used hot wire cutting machine to shape,made lead block,and then verified in a simulated film positioning machine,to be implemented after passing treatment, combined with verification results to make different error analysis and evaluation of the block.RESULTS：Between the blocks there were different levels of error,affected by every aspect of the quality of molded,avoiding these areas errors,could make the error to a minimum.CONCLUSION：Making conformal lead block with low meltingpoint lead is a good way in conventional radio-therapy,which not only meets the design requirements for radiation treatment planning,but also improve the accuracy of radio-therapy,and only quality control could ensure the quality of the block.

关 键 词：低熔点铅 放射治疗 质量控制 

分 类 号：R815[医药卫生—放射医学]