影像科学与光化学2023，Vol.41Issue(6)：332-337,6.DOI:10.7517/issn.1674-0475.230809
全踝关节置换术后CT复查中MAC技术去金属伪影的临床应用
Application of MAC Technique in CT Removal of Metal Artifacts after Total Ankle Arthroplasty
邹萌 1李真林 2潘雪琳 2樊敏2
作者信息
- 1. 四川大学华西医院上锦医院放射科,四川成都 610041
- 2. 四川大学华西医院放射科,四川成都 610041
- 折叠
摘要
Abstract
To investigate the clinical application value of metal artifact correction(MAC)to reduce metal artifact in CT after total ankle arthroplasty.40 patients who underwent CT reexamination after total ankle arthroplasty were retrospectively collected.The original data were reconstructed by MAC technique and KARL-3D iterative reconstruction and divided into two groups,group A was reconstructed by MAC technique and group B was reconstructed by KARL-3D iterative reconstruction.In group A and group B,the same two layers(tibial prosthesis and talus prosthesis)were selected to characterize the region of interest(ROI),measured the CT value and image noise,calculated the mean value,and calculated the signal-to-noise ratio(SNR)and contrastive noise ratio(CNR)using muscle as reference.Group A and group B were scored subjectively by two radiologists through blind method.The results show that,compared with group B,the CT values of the metal high density area,joint space beside prosthesis and bone tissue in group A were reduced,while the CT values of the metal low density area were increased.The image noise values in group A were all lower than those in group B,with statistical significance(P＜0.05).SNR,CNR and image score of group A were higher than those of group B,with statistical significance(P＜0.05).MAC reconstruction technique can reduce metal artifacts in CT examination after total ankle joint replacement,improve image quality,and has good clinical application value.关键词
去金属伪影/全踝关节置换术/CT扫描/重建算法Key words
demetallizing artifact/total ankle arthroplasty/CT scan/algorithm引用本文复制引用
邹萌,李真林,潘雪琳,樊敏..全踝关节置换术后CT复查中MAC技术去金属伪影的临床应用[J].影像科学与光化学,2023,41(6):332-337,6.
