摘要
目的:探讨基于体重指数(BMI)选择千伏对降低CT引导下射频消融治疗肝脏肿瘤辐射剂量的影响。方法:回顾性分析2019年1月1日至2019年12月31日进行的CT引导下肝脏射频消融术(男55例、女45例;年龄29~90岁)。在以下每个步骤:术前计划CT扫描、术中监测电极针位置CT扫描和术后CT扫描,都记录了辐射剂量。随后,将基于BMI的方案修改的管电压改变应用于肝脏肿瘤消融术(男52例、女48例;年龄30~91岁)。记录每个病例的图像质量和总体操作者的满意度(评分1~5分)。然后计算修改后的剂量减少量。结果:回顾性分析发现,CT引导下射频消融术的CT剂量指数(CTDIvol)为12.83±3.78mGy。方案修改后,平均CTDIvol下降至3.84±2.24mGy,总体降低70.07%。图像质量与修改前相比稍低,但两个阶段的图像质量均可满足CT引导下射频消融治疗肝脏肿瘤的需要。电极针显示和操作者的信心满意度差异没有统计学意义(P>0.05)。结论:基于BMI的千伏修改可以显著降低CT引导下经皮肝脏肿瘤消融期间的辐射剂量,而不会显著降低图像质量。
Objective:To explore the effect of selecting kilovolts based on body mass index(BMI)on reducing the radiation dose of radiofrequency ablation in liver tumors under CT guidance.Methods:CT-guided RFA for hepatic ablations performed from January 1,2019,through December 31,2019,were retrospectively reviewed(55 men and 45 women;aged,29~90 years).The radiation dose was recorded during each of the following steps:planning,performing,and postprocedure.BMI-based protocol modification changes in tube voltage and tube current were then applied to hepatic ablations performed subsequently(52 men and 48 women;aged 30~91 years).Image quality and overall operator satisfaction were noted for each case(score,1~5).Dose reduction after modification was then calculated.Results:Retrospective analysis found a mean(±SD)overall CT dose index(CTDI)for CT-guided RFA to be 12.83±3.78mGy.After protocol modification,the mean CTDI decreased to 3.84±2.24 mGy,a 70.07%reduction overall.The image quality was slightly lower compared to before the modification,but the image quality in both stages met the needs of CT-guided radiofrequency ablation for liver tumors.The difference between electrode needle display and operator confidence satisfaction was not statistically significant(P>0.05).Conclusion:BMI-based kilovolt modifications can significantly reduce the radiation dose during CT-guided percutaneous liver tumor ablation without significantly sacrificing image quality.
作者
赵君禄
聂关伟
赵炎
刘冲
郑立冬
赵德园
ZHAO Junlu;NIE Guanwei;LIU Chong(The First Hospital,Hebei Medical University,Hebei Shijiazhuang 050031,China)
出处
《河北医学》
CAS
2023年第2期336-339,共4页
Hebei Medicine
基金
河北省医学科学研究课题,(编号:20201164)。
关键词
射频消融
肝脏肿瘤
辐射剂量
低千伏
体重指数
Radiofrequency ablation
Liver tumor
Radiation dose
Low kilovolt
Body mass index
