A Multispectral Three-Dimensional Acquisition Technique for Imaging Near Metal Implants
A Multispectral Three-Dimensional Acquisition Technique for Imaging Near Metal Implants
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DOI：
10.1002/mrm.21856
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发表时间：
2009-02-01
影响因子：
3.3
通讯作者：
King, Kevin F.
中科院分区：
文献类型：
--
作者：
Koch, Kevin M.;Lorbiecki, John. E.;King, Kevin F.
用于骨和关节成形术的金属植入物对用于高场临床磁共振的B-0磁场产生严重的空间扰动。这些扰动扭曲了传统二维MRI技术中应用的切片选择和频率编码过程，阻碍了关节成形术并发症的诊断。本文提出了一种在射频发射和接收频率中使用离散偏移收集多个三维快速自旋回波图像的方法。结果表明，这种多采集变共振图像组合技术可以产生无片面畸变的复合图像，并且在读出方向上的畸变大大减少，即使在金属植入物的邻近区域也是如此。科学通报，2009(1):1-3。(c) 2009 Wiley-Liss, Inc。
Metallic Implants used In bone and joint arthroplasty Induce severe spatial perturbations to the B-0 magnetic field used for high-field clinical magnetic resonance. These perturbations distort slice-selection and frequency encoding processes applied In conventional two-dimensional MRI techniques and hinder the diagnosis of complications from arthroplasty. Here, a method is presented whereby multiple three-dimensional fast-spin-echo Images are collected using discrete offsets In RF transmission and reception frequency. It Is demonstrated that this multi acquisition variable-resonance Image combination technique can be used to generate a composite image that is devoid of slice-plane distortion and possesses greatly reduced distortions In the readout direction, even in the Immediate vicinity of metallic Implants. Magn Reson Mad 61:381-390, 2009. (c) 2009 Wiley-Liss, Inc.