EVALUATION OF CT TECHNIQUES FOR REDUCING ARTIFACTS IN THE PRESENCE OF METALLIC ORTHOPEDIC IMPLANTS
EVALUATION OF CT TECHNIQUES FOR REDUCING ARTIFACTS IN THE PRESENCE OF METALLIC ORTHOPEDIC IMPLANTS
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DOI：
10.1097/00004728-198803000-00012
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发表时间：
1988-03-01
影响因子：
1.3
通讯作者：
WALKER, PS
中科院分区：
文献类型：
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作者：
ROBERTSON, DD;WEISS, PJ;WALKER, PS
金属髓内矫形植入物产生的伪影可显著降低经轴CT图像质量。这些伪影，通常被看作是星爆条纹，主要是由于重建涉及丢失的投影数据。临床上有两种方法可用于减少骨科植入物周围的伪影。这些是具有较低衰减系数或较小路径长度（较少衰减对象）的植入物的成像以及图像数据的平面重新格式化。这两种方法的尺寸准确性进行了量化使用幻影和使用尸体股骨标本的有效性。结果表明，可以减少金属伪影，并获得准确的骨尺寸数据。
Metallic intramedullary orthopedic implants generate artifacts that can markedly degrade transaxial CT images. The artifacts, typically seen as starburst streaking, result primarily from reconstructions involving missing projection data. Two approaches are clinically available to reduce the artifacts around orthopedic implants. These are the imaging of implants with lower attenuation coefficients or smaller path lengths (less attenuating objects) and the planar reformatting of image data. The sizing accuracy of these two approaches was quantified using phantoms and the efficacy using cadaveric femoral specimens. Results demonstrated that metal artifacts may be reduced and accurate bony dimensional data obtained.