运动伪影校正技术改善肾动脉瘤锥形束CT图像质量  

Motion freeze technology for improving quality of cone-beam CT images of renal artery aneurysms

作　　者：刘伯山[1] 宋莉[1] 张玉香[1] 邹英华[1] 赵国栋 李响 巩悦勤 LIU Boshan;SONG L i;ZHANG Yuxiang;ZOU Yinghua;ZHAO Guodong;LI X iang;GONG Yueqin(Department of Interventional Radiology and Vascular Surgery,Peking University First Hospital,Beijing 100034,China)

机构地区：[1]北京大学第一医院介入血管外科,北京100034

出　　处：《中国介入影像与治疗学》2024年第6期363-367,共5页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的观察运动伪影校正技术(MFT)对于改善肾动脉瘤锥形束CT(CBCT)图像质量的价值。方法前瞻性选取20例拟接受经导管动脉栓塞治疗的肾动脉瘤患者,于CBCT引导下行肾动脉造影,采用MFT处理运动伪影;对MFT校正前、后图像质量进行主、客观评价,评估其显示肾动脉、载瘤动脉及靶区血管树情况,测算单位密度像素平均值(mean)、标准差(SD)及血管边缘锐化误差率。结果MFT校正后,肾动脉瘤最大密度投影图像显示肾动脉、重建CBCT图像显示载瘤动脉均明显优于校正前(P均<0.05);利用Flightplan for Liver软件可自动提取清晰的血管树;肾动脉瘤CBCT图像SD及血管边缘锐化误差率明显减小而mean明显增加(P均<0.05)。结论MFT可有效改善肾动脉瘤CBCT图像质量。Objective To observe the value of motion freeze technology(MFT)for improving the quality of cone-beam CT(CBCT)images of renal artery aneurysms.Methods Twenty patients with renal artery aneurysms who would receive transcatheter arterial embolization were prospectively enrolled.Renal artery angiography was performed under the guidance of CBCT,and motion artifacts were processed using MFT.Then subjective and objective evaluation of images before and after MFT correction were performed,aimed on displaying of renal artery,parent artery and vascular tree in target area,and the mean value(mean)and standard deviation(SD)of unit density pixels,margin sharpening error rate of blood vessels were measured and calculated.Results After MFT correction,the displaying of renal artery on maximum intensity projection images and parent artery on reconstructed CBCT images were significantly better than those before correction(both P<0.05),clear vascular trees could be automatically extracted using Flightplan for Liver software,SD and margin sharpening error rate of blood vessels of renal artery aneurysm significantly decreased but mean significantly increased on CBCT images(all P<0.05).Conclusion MFT could effectively improve the quality of CBCT images of renal artery aneurysms.

关 键 词：动脉瘤 伪影 锥形束计算机体层摄影术 

分 类 号：R732.21[医药卫生—肿瘤] R814.42[医药卫生—临床医学]