Effect of interference of metallic objects on interpretation of T1-weighted magnetic resonance images in the maxillofacial region.
Effect of interference of metallic objects on interpretation of T1-weighted magnetic resonance images in the maxillofacial region.
复制标题
金属物体的干扰对颌面部区域 T1 加权磁共振图像解释的影响。
DOI：
10.1067/moe.2000.105942
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
M. Mafee
中科院分区：
文献类型：
--
作者：
K. Abbaszadeh;L. Heffez;M. Mafee
目的
金属物体会在磁共振 (MR) 图像上产生伪影。然而，对该领域典型牙科材料的研究还很少。进行这项研究是为了描述和测量此类伪影的严重程度。
材料和方法
将各种牙科材料（牙科金、汞合金、不锈钢、钛、银钯和活力合金）的样品嵌入牛肌肉中，然后进行 T1 加权 MR 成像。这些材料具有常规颌面手术中遇到的典型形态和成分。测量 MR 伪影并与原始样本测量值进行比较。
结果
研究发现所有金属物体都会产生伪影并干扰 MR 图像的解释。伪影在物体的中心平面最为明显。黄金可以产出最伟大的神器，而汞合金则可以产出最少的神器。
结论
由于颌面部区域常用的金属都会在 MR 图像上产生伪影，因此应采取避免措施来尽量减少这些伪影的影响。
PURPOSE
Metallic objects produce artifacts on magnetic resonance (MR) images. However, studies on typical dental materials in this area are scant. This study was conducted to describe and measure the magnitude of such artifacts.
MATERIALS AND METHODS
Samples of various dental materials (dental gold, amalgam, stainless steel, titanium, silver-palladium, and vitallium) were embedded in bovine muscle and then subjected to T1-weighted MR imaging. The materials were of the typical morphology and composition encountered in routine maxillofacial practice. The MR artifacts were measured and compared with the original specimen measurements.
RESULTS
All metallic objects were found to produce artifacts and to interfere with the interpretation of MR images. Artifacts were most pronounced in the central plane of the object. Gold produced the greatest artifact, and amalgam produced the least.
CONCLUSION
Because metals commonly used in the maxillofacial region all produce artifacts on MR images, avoidance measures should be used to minimize the effect of these artifacts.