迭代重建技术在CT引导下射频消融治疗肝脏肿瘤中的应用价值  

Value of iterative reconstruction technique in radio frequency ablation of liver tumor via CT

作　　者：赵君禄[1] 聂关伟[2] 任庆云[1] 刘冲[1] 王猛[1] 

机构地区：[1]河北医科大学第一医院放射科,石家庄050031 [2]河北医科大学第一医院心外科,石家庄050031

出　　处：《医疗卫生装备》2016年第4期91-93,共3页Chinese Medical Equipment Journal

基　　金：河北省卫生与计划生育委员会指导性课题(ZD20140296)

摘　　要：目的:探讨迭代重建技术在CT引导下射频消融治疗肝脏肿瘤中的应用价值。方法:选取50例进行CT引导下肝脏射频消融治疗肝脏肿瘤的患者,首次扫描采用常规剂量(130 k V、参考毫安秒250 m As)扫描滤波反投影(filtered back projection,FBP)重建,后续监测电极针插入肿瘤过程扫描均采用低剂量(130 k V、参考毫安秒90 m As)扫描图像域迭代重建(iterative reconstruction in image space,IRIS),记录每次扫描的容积CT剂量指数(CT dose index volumes,CTDIvol)、剂量长度乘积(dose length product,DLP),并计算有效剂量(effect dose,ED)。结果:常规剂量组CTDIvol为(15.13±3.88)m Gy,DLP为(277.97±47.41)m Gy·cm,ED为(4.17±0.71)m Sv;低剂量组CTDIvol为(5.45±2.35)m Gy,DLP为(100.07±18.35)m Gy·cm,ED为(1.55±0.36)m Sv,低剂量组比常规剂量组辐射剂量降低了64%。2组的图像质量均能满足射频消融治疗监测电极针的诊断要求。结论:将迭代重建技术应用到CT引导下射频消融治疗肝脏肿瘤中,可以大幅降低辐射剂量,值得临床推广。Objective To study the value of iterative reconstruction in radio frequency ablation （RFA） of liver tumor via CT. Methods Totally 50 liver tumor patients underwent initial scanning with conventional dose （130 kV, 250 mAs） and filtered back projection （FBP） reconstruction, and then went through low-dose scanning （130 kV, 90 mAs） and iterative reconstruction in image space （IRIS）. The CT dose index volumes （CTDIvol）, dose length product （DLP） and effect dose fED） of two times of scanning were determined respectively. Results The conventional-dose scanning had the values of CTDIvol, DLP and ED being （15.13±3.88） mGy, （277.97±47.41） mGy. em and （4.17±0.71） mSv, and the low-dose scanning had the values being （5.45± 2.35） mGy, （100.07±18.35） mGy. cm and （1.55±0.36） roSy. The radiation dosage of the low-dose scanning was less than that of the conventional-dose scanning by 64%, and the two scanning modes could both meet the requirements for monitoring the electrode needle during RFA therapy. Conclusion IRIS technique decreases the radiation dose in RFA of liver tumor via CT, which is worth clinical promoting.

关 键 词：迭代重建 射频消融 肝脏肿瘤 辐射剂量 

分 类 号：R735.7[医药卫生—肿瘤] R730.44[医药卫生—临床医学]