Do Thuy Duong, Sutter Reto, Skornitzke Stephan, Weber Marc-André
Department of Clinical Radiology, University of Heidelberg, Germany.
Radiology, Uniklinik Balgrist, Zurich, Switzerland.
Rofo. 2018 Jan;190(1):31-41. doi: 10.1055/s-0043-118127. Epub 2017 Sep 21.
Orthopedic hardware impairs image quality in cross-sectional imaging. With an increasing number of orthopedic implants in an aging population, the need to mitigate metal artifacts in computed tomography and magnetic resonance imaging is becoming increasingly relevant. This review provides an overview of the major artifacts in CT and MRI and state-of-the-art solutions to improve image quality. All steps of image acquisition from device selection, scan preparations and parameters to image post-processing influence the magnitude of metal artifacts. Technological advances like dual-energy CT with the possibility of virtual monochromatic imaging (VMI) and new materials offer opportunities to further reduce artifacts in CT and MRI. Dedicated metal artifact reduction sequences contain algorithms to reduce artifacts and improve imaging of surrounding tissue and are essential tools in orthopedic imaging to detect postoperative complications in early stages.
· Tissues around orthopaedic hardware can still be well visualised despite metal artifacts.. · Artefact reduction in CT: acquisition parameters, iterative reconstruction, Dual-energy CT and VMI.. · Artefact reduction in MRI: choice of device, sequences, acquisition parameters and MARS.
· Do TD, Sutter R, Skornitzke S et al. CT and MRI Techniques for Imaging Around Orthopedic Hardware. Fortschr Röntgenstr 2018; 190: 31 - 41.
骨科植入物会降低横断面成像的图像质量。随着老年人口中骨科植入物数量的增加，减轻计算机断层扫描（CT）和磁共振成像（MRI）中金属伪影的需求变得越来越重要。本综述概述了CT和MRI中的主要伪影以及提高图像质量的最新解决方案。从设备选择、扫描准备和参数到图像后处理的图像采集的所有步骤都会影响金属伪影的大小。像具有虚拟单色成像（VMI）可能性的双能CT等技术进步和新材料为进一步减少CT和MRI中的伪影提供了机会。专用的金属伪影减少序列包含减少伪影和改善周围组织成像的算法，是骨科成像中早期检测术后并发症的重要工具。
· 尽管存在金属伪影，骨科植入物周围的组织仍可清晰显示。· CT中的伪影减少：采集参数、迭代重建、双能CT和VMI。· MRI中的伪影减少：设备选择、序列、采集参数和MARS。
· Do TD, Sutter R, Skornitzke S等。骨科植入物周围成像的CT和MRI技术。Fortschr Röntgenstr 2018; 190: 31 - 41。
