在MRI中管理与硬件相关的金属工件:当前和不断发展的技术
Georg C Feuerriegel1, Reto Sutter2
1Department of Radiology, Balgrist University Hospital, Faculty of Medicine, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland. georg.feuerriegel@balgrist.ch.
Skeletal radiology
|February 21, 2024
概括
在植入物周围的MRI扫描中,金属工件阻碍了准确的诊断. 新的硬件和软件技术,包括深度学习,正在改善成像质量,以更好地照顾患者.
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 在磁共振成像 (MRI) 中的金属植入物会由于磁感应差异而导致人工物.
- 这些文物包括信号损失,几何扭曲和脂肪抑制损失,损害诊断准确性.
- 关节置换的患病率越来越高,需要改善术后评估的成像.
研究的目的:
- 审查MRI中临床适用的金属工件减少技术的最新进展.
- 讨论MR硬件的改进及其对人工物减少的影响.
- 提供对金属工件减少原理,技术和局限性的全面了解.
主要方法:
- 硬件改进:高密度射频线圈,并行成像,梯度曲折校正,灵敏度匹配的植入物,低场MRI.
- 基于序列的方法:视角倾斜 (VAT) 和切片编码用于金属工件校正 (SEMAC).
- 重建和后处理:代算法,深度学习方法和文物校正技术.
主要成果:
- 硬件的进步可以增强信号,加快采集速度,并最大限度地减少扭曲.
- 特定的序列 (VAT,SEMAC) 和先进的算法有效地减少金属文物.
- 灵敏度匹配的植入物和低场MRI降低了磁性灵敏度差异.
结论:
- 最近的发展在肌肉骨MRI中减少金属工件方面取得了显著的改进.
- 对这些技术及其局限性的彻底理解对于有效的临床应用至关重要.
- 这些进步有助于更好地进行放射性评估,以管理术后并发症.
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