[Effects of Subject Position on Metal Artifact Reduction of a Reverse Shoulder Prosthesis Using Computed Tomography].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2024-05-21 DOI:10.6009/jjrt.2024-1456

Tetsuya Ijichi, Nariaki Tabata, Yuna Kawahara, Asami Obata, Masaya Tominaga, Hironori Nakamura, Toshirou Inoue

{"title":"[Effects of Subject Position on Metal Artifact Reduction of a Reverse Shoulder Prosthesis Using Computed Tomography].","authors":"Tetsuya Ijichi, Nariaki Tabata, Yuna Kawahara, Asami Obata, Masaya Tominaga, Hironori Nakamura, Toshirou Inoue","doi":"10.6009/jjrt.2024-1456","DOIUrl":null,"url":null,"abstract":"Purpose: To validate the effects of subject position on single energy metal artifact reduction (SEMAR) of a reverse shoulder prosthesis using computed tomography (CT).Methods: A water phantom with a reverse shoulder prosthesis was scanned at four positions on the XY plane of the CT gantry (on-center, 50 mm, 100 mm, and 150 mm from on-center in the negative direction of the X axis, respectively). We obtained images with and without SEMAR. The artifact index (AI) was measured via physical assessment. Scheffé's (Ura) paired comparison methods were performed with the amount of metal artifact by ten radiological technologists via visual assessment.Results: The AI was significantly reduced when using SEMAR. As the phantom moved away from the on-center position, the AI increased, and metal artifacts increased in Scheffé's methods.Conclusion: SEMAR reduces metal artifacts of a reverse shoulder prosthesis, but metal artifacts may increase as the subject position moves away from the on-center position.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nihon Hoshasen Gijutsu Gakkai zasshi","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6009/jjrt.2024-1456","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Purpose: To validate the effects of subject position on single energy metal artifact reduction (SEMAR) of a reverse shoulder prosthesis using computed tomography (CT).

Methods: A water phantom with a reverse shoulder prosthesis was scanned at four positions on the XY plane of the CT gantry (on-center, 50 mm, 100 mm, and 150 mm from on-center in the negative direction of the X axis, respectively). We obtained images with and without SEMAR. The artifact index (AI) was measured via physical assessment. Scheffé's (Ura) paired comparison methods were performed with the amount of metal artifact by ten radiological technologists via visual assessment.

Results: The AI was significantly reduced when using SEMAR. As the phantom moved away from the on-center position, the AI increased, and metal artifacts increased in Scheffé's methods.

Conclusion: SEMAR reduces metal artifacts of a reverse shoulder prosthesis, but metal artifacts may increase as the subject position moves away from the on-center position.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

[受试者位置对利用计算机断层扫描减少反向肩关节假体金属伪影的影响]。

目的：验证受试者位置对使用计算机断层扫描（CT）减少反向肩关节假体的单能金属伪影（SEMAR）的影响：方法：在计算机断层扫描机架 XY 平面上的四个位置（X 轴负方向上分别距中心 50 毫米、100 毫米和 150 毫米）扫描装有反向肩关节假体的水模型。我们获得了有 SEMAR 和无 SEMAR 的图像。通过物理评估测量伪影指数（AI）。十位放射技师通过目测评估金属伪影的数量，采用 Scheffé's (Ura) 配对比较法：结果：使用 SEMAR 时，AI 明显降低。结果：当使用 SEMAR 时，AI 明显降低；当模型远离中心位置时，AI 增加，Scheffé 方法中的金属伪影增加：结论：SEMAR 可减少反向肩关节假体的金属伪影，但随着假体位置远离中心位置，金属伪影可能会增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Nihon Hoshasen Gijutsu Gakkai zasshi

自引率

0.00%

发文量