Application of MAC Technique in CT Removal of Metal Artifacts after Total Ankle Arthroplasty

doi:10.7517/issn.1674-0475.230809

Abstract

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.

Key words: demetallizing artifact, total ankle arthroplasty, CT scan, algorithm

ZOU Meng, LI Zhenlin, PAN Xuelin, FAN Min. Application of MAC Technique in CT Removal of Metal Artifacts after Total Ankle Arthroplasty[J]. IMAGING SCIENCE AND PHOTOCHEMISTRY, 2023, 41(6): 332-337.

References

[1] 邹萌, 李真林, 潘雪琳, 等. 负重位踝关节X线摄影在人工踝关节置换术前的临床应用价值[J]. 四川医学,2021, 42(7):711-716.
[2] 武勇, 王岩, 赖良鹏, 等. 应用人工全踝关节置换术治疗终末期踝关节炎远期效果观察[J]. 骨科临床与研究杂志, 2018, 3(6):329-334.
[3] 赵晓, 余泽俊, 朱明双. 踝关节骨性关节炎的临床治疗进展[J]. 世界最新医学信息文摘, 2018, 18(68):56-60.
[4] 王玉光, 陆芸. 踝关节骨关节炎治疗方法的临床回顾[J]. 中华关节外科杂志(电子版), 2016, 10(1):77-80.
[5] 潘雪琳, 洪静, 袁元, 等. MAC技术在降低颈椎金属内固定术后CT扫描金属伪影的临床价值[J]. 中国医疗设备, 2021, 36(11):81-85.
[6] Große Hokamp N, Neuhaus V, Abdullayev N, et al. Reduction of artifacts caused by orthopedic hardware in the spine in spectral detector CT examinations using virtual monoenergetic image reconstructions and metal-artifact-reduction algorithms[J]. Skeletal Radiology, 2018, 47(2):195-201.
[7] 朱薇, 张林, 王玲, 等. 快速康复理念对踝关节置换术后关节功能及疼痛程度影响的临床观察[J]. 齐齐哈尔医学院学报, 2018, 39(23):2843-2845.
[8] 陈彦博,曾钢,李嘉杰,等.联合两代假体全踝关节置换治疗大骨节病踝关节炎[J].中华关节外科杂志(电子版),2021,15(6):766-769.
[9] Chu A K, Wilson M D, Houng B, et al. Outcomes of ankle arthrodesis conversion to total ankle arthroplasty:A systematic review[J]. The Journal of Foot & Ankle Surgery, 2021, 60(2):362-367.
[10] 薛浩文, 褚虹宇, 左解鹏, 等. 基于CT的中国正常成人踝关节三维形态学分析及应用研究[J]. 中国临床解剖学杂志, 2021, 39(5):539-545.
[11] 李笑石, 石磊, 刘豹, 等. 双源CT双能量线性融合重建去除腰椎固定物金属伪影的初步研究[J]. 中国医疗设备, 2017, 32(5):19-21.
[12] 李平, 赵静, 江利, 等. 320排CT去金属伪影技术在髋关节置换术后的应用[J]. 中国医药科学, 2017, 7(11):167-169.
[13] 黄钟杰, 刘源, 肖芝豹, 等. 宝石CT能谱成像去除脊柱金属植入物伪影的应用研究[J]. 中国医学计算机成像杂志, 2013, 19(1):79-83.
[14] 王淑贤, 万娅敏, 谭红娜, 等. 双源CT FAST DE技术在去除腰椎金属内固定物伪影中的价值[J]. 临床放射学杂志, 2016, 35(3):466-469.
[15] 刘卓, 魏拓, 洪楠, 等. 双能量CT联合金属伪影削减算法抑制股骨柄假体金属伪影的模型研究[J]. 放射学实践, 2019, 34(3):332-336.
[16] 王霞, 黄晓旗, 赵凡惠, 等. KARL-3D迭代重建及MAC重建技术在CT检查中去金属植入物伪影的临床应用价值[J]. 临床医学研究与实践, 2021, 6(2):111-113.
[17] 武勇, 赖良鹏, 王岩, 等. 全踝关节置换治疗终末期踝关节炎疗效分析[J]. 中华骨科杂志, 2015, 35(7):699-706.