CT定位增强扫描对胸部肿瘤放疗剂量分布的影响

The Effect of CT Enhanced Scan on Radiation Dose Distribution in Thoracic Tumor

目的探讨CT定位增强扫描对胸部肿瘤放疗剂量分布的影响。方法研究对象共120例,均是从本院2016年9月—2017年11月所接收的胸部肿瘤患者中选出的,在本次研究中所选取120例胸部肿瘤患者中,有78例患者所患肿瘤分布在纵膈上,有42例患者所患肿瘤为各类型肺癌。此次研究所选取的120例患者均接受CT定位增强扫描。结果本次研究所选取的120例患者在接受CT增强扫描之后发现,在患者靶区内随机采样对其进行扫描,其剂量中最大的差异为3.14%,但是在正常组织区域内随机采样对患者进行扫描,其最大差异可以达到5.10%,两者对比,差异具有统计学意义(χ~2=4.29,P<0.05)。经本次研究发现,剂量点的不同所造成的最大差异可以达到10.00%。结论在胸部肿瘤患者的3DCRT计划当中,患者在接受CT定位增强扫描时是会对患者造成一定的剂量影响的。因此在后续的工作当中,临床工作人员在对胸部肿瘤患者实施放疗时,对造影剂剂量的使用以及其所会造成的影响进行考虑是非常重要的。

Objective To investigate the effect of CT enhanced scan on the dose distribution of radiotherapy in the chest tumor.Methods A total of120cases,all selected patients with chest tumor received in our hospital from September2016to November2017,the study selected120cases of breast cancer patients,78patients suffering from tumor distribution in the mediastinum,42cases of patients suffering from cancer for all types of lung cancer.120patients selected in this study received enhanced CT scan.Results The study of120cases selected patients after underwent CT enhanced scan in the target area,with random sampling of the scan,the largest dose difference was3.14%,but in normal tissue in the region of random sampling to scan the patients,the maximum difference can reach5.10%.The difference wasstatistically significant(χ2=4.29,P<0.05).It was found that the maximum difference in dose points could reach10.00%.Conclusion In the3DCRT plan of the patients with chest tumor,the patient will have a certain dose effect on thepatient when they receive the enhanced scan of CT.Therefore,in the follow-up work,the clinical staff in the implementation of radiotherapy for patients withchest tumor,the use of contrast agent dosage.It is very important to consider the use of the dose of the contrast agent and its effects.