VHS技术髌骨4D运动轨迹80kV低剂量成像中管电流参数的优化探讨  

Optimization of Tube Current Parameters in 4D Tracking of Patella with 80 kV Low-Dose Imaging by VHS Technique

作　　者：杨宝军[1] 席建平[1] 赵春丽 马新 张玲惠 王阿娇 YANG Baojun;XI Jianping;ZHAO Chunli;MA Xin;ZHANG Linghui;WANG Ajiao(CT Room,Baoji Tradition Chinese Medicine Hospital,Baoji Shaanxi 721001,China;Department of Obstetrics and Gynecology,Baoji Tradition Chinese Medicine Hospital,Baoji Shaanxi 721001,China)

机构地区：[1]宝鸡市中医医院CT室,陕西宝鸡721001 [2]宝鸡市中医医院妇产科,陕西宝鸡721001

出　　处：《中国医疗设备》2020年第8期67-70,共4页China Medical Devices

基　　金：陕西省宝鸡市卫计局2017年科研招标课题(2017-15)。

摘　　要：目的探讨采用80 kV超低管电压进行髌骨4D运动轨迹成像时最佳的管电流参数。方法选择临床拟诊髌股关节紊乱患者72例,将其随机分为A、B、C三组,管电流分别使用自动管电流调制技术、手动100 mA及80 mA,管电压均为80 kV,容积螺旋穿梭扫描模式,标准算法重建,对所得图像进行客观评价及综合评分。比较分析各组图像质量评分及辐射剂量。结果C组辐射剂量最低,分别较A组及B组辐射剂量下降了60.01%及32.78%,具有统计学意义;A组图像质量评分最高,B组及C组评分依次降低,但无明显统计学意义。结论ATCM技术在80 kV低剂量成像时会因各种因素失效,而80 mA为推荐的最佳管电流。Objective To explore the optimal tube current parameters for the 4D tracking of the tibia using 80 kV ultra-low tube voltage.Methods Total of 72 patients with clinically diagnosed patellofemoral joint disorders were selected and randomly divided into three groups:A group,B group,and C group.Automatic tube current modulation technology,manual 100 mA and 80 mA were used for tube current,and the tube voltage was 80 kV.Volume helical shuttle(VHS)scanning mode was used,and reconstructed with standard algorithm.The images were evaluated objectively and comprehensively,and the image quality score and radiation dose of each group were compared and analyzed.Results The radiation dose of C group was the lowest,which was 60.01%and 32.78%statistically significant lower than that of A group and B group,respectively.The image quality score of A group was the highest,while the score of B group and C group decreased in turn,but there was no statistical significance.Conclusion ATCM technology will fail due to various factors in low dose imaging of 80 kV,whilie 80 mA is the recommended optimal tube current.

关 键 词：容积螺旋穿梭 髌股关节 低剂量 体层摄影术 X线计算机 

分 类 号：R445.2[医药卫生—影像医学与核医学]