[牙科金属材料对磁共振成像的影响]

[Influence of dental metallic materials on MR imaging].

作者信息

Jin Ling-Yan, Lin Jun

机构信息

Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.

出版信息

Zhejiang Da Xue Xue Bao Yi Xue Ban. 2009 May;38(3):328-32. doi: 10.3785/j.issn.1008-9292.2009.03.018.

DOI:10.3785/j.issn.1008-9292.2009.03.018

PMID:19504645

Abstract

Magnetic resonance imaging (MRI) technique is one of the most commonly used imaging diagnostic techniques for pate diseases at present.Metal and alloy are commonly used in dental practice. The artifacts on MRI caused by metal and alloy may result in attenuation of signal intensity, image distortion and signal loss, which severely influences imaging quality. So these materials confine the application of MRI on pate. In this paper, the influence of dental metallic materials on MRI is discussed. It expounds the generation and principals of MR artifacts, the influence of artifacts of metal dental prosthetic restoration, the effects of choosing different MR sequences and imaging weight on MRI, as well as how to prevent and diminish artifacts, to provide reference for clinical practice.

摘要

磁共振成像（MRI）技术是目前临床上最常用的针对颌面部疾病的影像诊断技术之一。金属和合金在牙科实践中被广泛应用。金属和合金在MRI上产生的伪影可能导致信号强度衰减、图像失真和信号丢失，这严重影响成像质量。因此，这些材料限制了MRI在颌面部的应用。本文探讨了牙科金属材料对MRI的影响。阐述了MR伪影的产生及原理、金属牙修复体伪影的影响、不同MR序列和成像权重对MRI的影响，以及如何预防和减少伪影，为临床实践提供参考。