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The application of metal artifact reduction methods on computed tomography scans for radiotherapy applications: A literature review
Journal of Applied Clinical Medical Physics ( IF 2.1 ) Pub Date : 2021-05-03 , DOI: 10.1002/acm2.13255
Sathyathas Puvanasunthararajah 1, 2 , Davide Fontanarosa 1, 2 , Marie-Luise Wille 2, 3, 4 , Saskia M Camps 5
Affiliation  

Metal artifact reduction (MAR) methods are used to reduce artifacts from metals or metal components in computed tomography (CT). In radiotherapy (RT), CT is the most used imaging modality for planning, whose quality is often affected by metal artifacts. The aim of this study is to systematically review the impact of MAR methods on CT Hounsfield Unit values, contouring of regions of interest, and dose calculation for RT applications. This systematic review is performed in accordance with the PRISMA guidelines; the PubMed and Web of Science databases were searched using the main keywords “metal artifact reduction”, “computed tomography” and “radiotherapy”. A total of 382 publications were identified, of which 40 (including one review article) met the inclusion criteria and were included in this review. The selected publications (except for the review article) were grouped into two main categories: commercial MAR methods and research-based MAR methods. Conclusion: The application of MAR methods on CT scans can improve treatment planning quality in RT. However, none of the investigated or proposed MAR methods was completely satisfactory for RT applications because of limitations such as the introduction of other errors (e.g., other artifacts) or image quality degradation (e.g., blurring), and further research is still necessary to overcome these challenges.

中文翻译:

金属伪影减少方法在放射治疗计算机断层扫描中的应用:文献综述

金属伪影减少 (MAR) 方法用于减少计算机断层扫描 (CT) 中金属或金属成分的伪影。在放射治疗 (RT) 中,CT 是最常用的规划成像方式,其质量常常受到金属伪影的影响。本研究的目的是系统地回顾 MAR 方法对 CT Hounsfield 单位值、感兴趣区域轮廓以及 RT 应用剂量计算的影响。该系统审查是根据 PRISMA 指南进行的;使用主要关键词“金属伪影减少”、“计算机断层扫描”和“放射治疗”对 PubMed 和 Web of Science 数据库进行了搜索。共鉴定出382篇出版物,其中40篇(包括一篇综述文章)符合纳入标准并纳入本次综述。所选出版物(综述文章除外)分为两大类:商业 MAR 方法和基于研究的 MAR 方法。结论:MAR方法在CT扫描上的应用可以提高RT治疗计划的质量。然而,由于引入其他错误(例如其他伪影)或图像质量下降(例如模糊)等限制,所研究或提出的 MAR 方法都不能完全满足 RT 应用,并且仍需要进一步研究来克服这些挑战。
更新日期:2021-06-14
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