320排容积CT肘关节优化体位扫描技术的应用  

Applications of Optimized Position Scanning Technology of Elbow Joint on 320 Rows Volume CT

作　　者：李雅芳 张进慧 徐如林 周建军 LI Yafang;ZHANG Jinhui;XU Rulin;ZHOU Jianjun(Department of Radiology,Zhongshan Hospital(Xiamen),Fudan University,Xiamen Fujian 361000,China;CT Research Collaboration Department of Canon Medical System(China)Co.,Ltd.,Guangzhou Guangdong 510627,China;Department of Radiology,Zhongshan Hospital,Fudan University,Shanghai 200032,China)

机构地区：[1]复旦大学附属中山医院厦门医院放射科,福建厦门361000 [2]佳能医疗系统(中国)有限公司CT科研合作部,广东广州510627 [3]复旦大学附属中山医院放射科,上海200032

出　　处：《中国医疗设备》2022年第8期66-69,共4页China Medical Devices

摘　　要：目的探讨佳能320排CT肘关节容积扫描优化方法及临床应用价值,以得到更高图像质量的同时降低受检者辐射剂量。方法以在本院就诊的42例肘关节损伤的患者做为研究对象,均行CT扫描,根据不同体位扫描方式将其分为观察组(体位改进优化)与对照组(肘关节置于身体侧边),每组21例,比较两组主观和客观图像质量及辐射剂量情况。结果观察组肘关节CT扫描图像的信噪比和对比噪声比分别为(13.9±3.4)、(55±13.7),显著高于对照组的(6.7±2.9)、(21.3±8.3);观察组和对照组的图像质量主观评分分别为(2.95±0.22)、(2.38±0.81)分,差异均有统计学意义(P<0.05)。观察组和对照组的容积CT剂量指数分别为2、(9.5±4.9)mGy;剂量长度乘积分别为31.7、(155.7±47.2)mGy·cm,差异有统计学意义(P<0.05)。结论利用宽体探测器实现肘关节站立位的16 cm容积扫描能做到单纯的肘关节检查,与传统体位的扫描方式相比,能获得更高的图像质量且辐射剂量更低,可作为CT扫描首选体位。Objective To explore the optimization method and clinical application value of Canon 320-rows CT elbow volume scanning to obtain higher image quality and reduce the radiation dose of the subjects.Methods In this study,42 cases of patients with elbow injury in our hospital were taken as the research subjects,and all received CT scan.According to different posture scanning methods,they were divided into observation group(improved posture optimization)and control group(elbow was placed on the side of the body),with 21 cases in each group.Subjective and objective image quality and radiation dose between the two groups were compared.Results The signal to noise ratio and contrast to noise ratio of CT scans of the elbow in the observation group was(13.9±3.4)and(55±13.7),respectively,which were significant higher than those in the control group of(6.7±2.9)and(21.3±8.3).The image quality subjective scores in the observation and control groups were(2.95±0.22)and(2.38±0.81)scores,respectively,the difference was statistically significant(P<0.05).The volume CT dose index of the observation group and the control group was 2,(9.5±4.9)mGy,respectively,and dose length product was 31.7,(155.7±47.2)mGy·cm,respectively,and the difference was statistically significant(P<0.05).Conclusion Using the wide-body detector to achieve the standing position of the elbow with a volume scan of 16 cm can achieve a simple examination of the elbow.Compared with the traditional scanning method,it can obtain higher image quality and lower radiation dose,so it can be used as the preferred position for CT scanning.

关 键 词：肘关节 CT扫描 体位优化 图像质量 

分 类 号：R816[医药卫生—放射医学]