Motion artifacts in MRI: A complex problem with many partial solutions.
Motion artifacts in MRI: A complex problem with many partial solutions.
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DOI：
10.1002/jmri.24850
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发表时间：
2015-10
期刊：
影响因子：
--
通讯作者：
Herbst M
中科院分区：
文献类型：
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作者：
Zaitsev M;Maclaren J;Herbst M
自从磁共振成像（MRI）作为一种临床成像方式被引入以来，受试者在磁共振成像（MRI）过程中的运动一直是个问题。虽然对粒子运动或血流的敏感性可用于提供有用的图像对比度，但整体运动在大多数临床应用中提出了相当大的问题。它是最常见的文物来源之一。经过 30 多年的研究，已经产生了多种减轻或校正运动伪影的方法，但没有一种方法可以应用于所有成像情况。相反，存在一个方法“工具箱”，其中每个工具适合某些任务，但不适用于其他任务。本文回顾了运动伪影的起源，并介绍了当前的缓解和校正方法。在某些成像情况下，当前可用的运动校正工具非常有效；在其他情况下，仍然需要开发适当的工具。看来这种多方面的方法最终将解决 MRI 中的运动敏感性问题，而不是在所有情况下都有效的单一解决方案。本综述重点强调解释此类伪影发生背后的物理原理，旨在帮助特定临床情况下的伪影检测和缓解。
Subject motion during magnetic resonance imaging (MRI) has been problematic since its introduction as a clinical imaging modality. While sensitivity to particle motion or blood flow can be used to provide useful image contrast, bulk motion presents a considerable problem in the majority of clinical applications. It is one of the most frequent sources of artefacts. Over 30 years of research have produced numerous methods to mitigate or correct for motion artefacts, but no single method can be applied in all imaging situations. Instead, a ‘toolbox’ of methods exists, where each tool is suitable for some tasks, but not for others. This article reviews the origins of motion artefacts and presents current mitigation and correction methods. In some imaging situations, the currently available motion correction tools are highly effective; in other cases, appropriate tools still need to be developed. It seems likely that this multifaceted approach will be what eventually solves the motion sensitivity problem in MRI, rather than a single solution that is effective in all situations. This review places a strong emphasis on explaining the physics behind the occurrence of such artefacts, with the aim of aiding artefact detection and mitigation in particular clinical situations.