摘要
目的评价迭代去金属伪影(IMAR)在去除髋关节植入物金属伪影中存在的临床价值。方法回顾性收集17例髋关节金属植入物受检者的CT图像,分别采用IMAR和滤波反投影(FBP)两种重建算法,由两名放射科医师采用4分法分别对2种重建图像进行主观图像质量评价,比较两组图像的质量评分差异;测量两组图像中假体附近伪影最严重层面伪影的噪声值,比较两组图像的噪声差异。结果受试者IMAR重建图像质量评分明显高于FBP重建的图像质量评分,两者比较差异有统计学意义(Z=-3.787,P=0.000);IMAR图像噪声明显低于FBP图像中的噪声;IMAR和FBP图像噪声之间的差异有统计学意义(t=7.493,P=0.000)。结论IMAR能够明显减少髋关节金属植入物的伪影,具有良好的临床应用价值。
Objective To evaluate the clinical value of the iterative metal artifact reduction(IMAR)in reducing the metal artifacts from hip implantation matertial.Methods The CT images in 17 subjects with hip metal implantation material were retrospectively collected.The two reconstruction algorithms of IMAR and FBP were adopted respectively.The two radiologists adopted the 4-point method to conduct the subjective image quality evaluation on the two kinds of reconstructed images.The differences in the quality evaluation scores of images were compared between the two groups.The noise values of the artifacts at the most serious layer near the prosthesis in the two groups of images were measured and the noise differences were compared between the two groups.Results The quality score of IMAR reconstruction images in the subjects was significantly higher than that of FBP reconstruction image,and the difference between them was statistically significant(Z=-3.787,P=0.000).The noise of IMAR images was significantly lower than that of FBP images,and the difference between the noises of IMAR and FBP images was statistically significant(t=7.493,P=0.000).Conclusion IMAR can significantly decrease the artifacts of hip metal implantation material and has good clinical application value.
作者
姚开情
吕发金
吕亮
郁仁强
李信友
YAO Kaiqing;LYU Fajin;LYU Liang;YU Renqiang;LI Xinyou(Department of Radiology,The First Affiliated Hospital of Chongqing Medical University,Chongqing 400016,China;Department of Radiology,Chongqing General Hospital,Chongqing 400014,China)
出处
《重庆医学》
CAS
2020年第12期1943-1945,共3页
Chongqing medicine
关键词
CT
迭代去金属伪影
髋关节
CT
iterative metal artifact reduction
hip
