腰椎间盘CT 2种模式扫描剂量的比较  

Comparison of radiation doses between two modes in lumber interverbral disc CT scan

作　　者：李晓娜[1] 王矞辉[2] 张英华[1] 王晓英[1] 孙琛 彭志刚[1] LI Xiao-na;WANG Yu-hui;ZHANG Ying-hua;WANG Xiao-ying;SUN Chen;PENG Zhi-gang(Department of Computed Tomography,the Third Hospital of Hebei Medical University,Shijiazhuang 050051,China;Department of Equipment,the Third Hospital of Hebei Medical University,Shijiazhuang 050051,China;The School of Medical Imaging of Hebei Medical University,Shijiazhuang 050035,China)

机构地区：[1]河北医科大学第三医院CT室,河北石家庄050051 [2]河北医科大学第三医院设备处,河北石家庄050051 [3]河北医科大学影像学院,河北石家庄050035

出　　处：《河北医科大学学报》2019年第5期565-569,共5页Journal of Hebei Medical University

摘　　要：目的比较腰椎间盘序列扫描模式与腰椎连扫重建腰椎间盘模式CT(computed tomography)辐射剂量和图像质量。方法选取临床怀疑腰椎间盘突出患者128例,随机分成A组和B组各64例。A组采用常规腰椎间盘序列扫描模式;B组采用腰椎连扫重建腰椎间盘模式,并使用自动调控管电流系统,扫描结束后原始数据进行多平面重组,重建出与常规椎间盘对应部位的轴面图像。然后记录2种模式扫描的辐射剂量并由有资历诊断医师双盲法分析对应轴位图像质量。结果 B组扫描时间和剂量长度均短于和小于A组(P<0.05);B组腹主动脉信噪比低于A组(P<0.05); 2位医师对图像质量的主观评级比较一致。2种模式均能较好地显示腰椎间盘病变,特别是腰椎连扫重建模式更便于立体观察。结论对于腰椎间盘CT扫描的检查,选用腰椎连扫重建间盘模式扫描并配合自动调控管电流技术可降低受检者的辐射剂量。Objective To investigate the effects of the sequential lumbar intervertebral disc scanning mode and the continuous lumbar interverbral disc reconstruction mode on computed tomography(CT)radiation dose and image quality of lumbar intervertebral disc.Methods One hundred and twenty-eight patients with clinically suspected lumbar disc herniation were randomly divided into two groups.One group(group A)used conventional sequential lumbar intervertebral disc scanning mode;another group(group B)used the scan mode with the automatic expose control system that the normal intervertebral disc was reconstructed by continuous lumbar scanning,in which the original data were reconstructed by multi-plane reconstruction after scanning.The reconstructed axial images were corresponding to the part of the conventional disc position.Then the radiation doses of the two mode scans were recorded and the image quality of the corresponding axial images was analyzed through the double-blind method by two qualified diagnostic doctors.Results The scan time and radiation dose of group B in lumbar disc reconstruction mode was less than those of group A in sequential lumbar disc scan mode(P<0.05).The signal-to-noise ratio of abdominal aorta in group B was lower than that in group A(P<0.05).However,two diagnostic doctors had consistent subjective rating for image quality.Two groups can better display lumber diseases,especially the lumbar vertebral reconstruction model(group B)is more convenient for stereoscopic observation.Conclusion For the CT examination of lumbar intervertebral disc,the continuous lumbar interverbral disc reconstruction mode combined with automatic expose control technique can reduce the radiation dose.

关 键 词：腰椎间盘 体层摄影术 螺旋计算机 辐射剂量 

分 类 号：R323.4[医药卫生—人体解剖和组织胚胎学]