Artifacts in magnetic resonance imaging from metals
Artifacts in magnetic resonance imaging from metals
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DOI：
10.1063/1.361649
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发表时间：
1996-04-15
影响因子：
3.2
通讯作者：
Donahue, MJ
中科院分区：
文献类型：
--
作者：
Bennett, LH;Wang, PS;Donahue, MJ
金属生物医学植入物，如动脉瘤夹、内假体和内部矫形器械，会在患者的磁共振图像（MRI）中产生伪影。这样的伪影损害了图像中包含的信息，该信息恰好在最感兴趣的区域中，即在金属装置附近。铁磁材料是禁忌的，因为在MRI程序中与其移动相关的危险。在磁性较弱的金属中，有人认为伪影的程度与金属的磁化率有关，但似乎没有系统的数据。当磁化率足够小时，观察到由于电导率引起的附加伪影。我们提出了两种低磁化率金属，钛（相对磁导率μ（r）约为1.0002）和铜（μ（r）约为0.99998）产生的MRI伪影的初步系统研究，包括实验，理论和计算机模拟结果。(C)1996年美国物理学会。
Metallic biomedical implants, such as aneurysm Clips, endoprostheses, and internal orthopedic devices give rise to artifacts in the magnetic resonance image (MRI) of patients. Such artifacts impair the information contained in the image in precisely the region of most interest, namely near the metallic device. Ferromagnetic materials are contraindicated because of the hazards associated with their movement during the MRI procedure. In less-magnetic metals, it has been suggested that the extent of the artifact is related to the magnetic susceptibility of the metal, but no systematic data appear to be available. When the susceptibility is sufficiently small, an additional artifact due to electrical conductivity is observed. We present an initial systematic study of MRI artifacts produced by two low susceptibility metals, titanium (relative permeability mu(r) approximate to 1.0002) and copper (mu(r) approximate to 0.99998), including experimental, theoretical, and computer simulation results. (C) 1996 American Institute of Physics.