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MRI compatibility of several early transition metal based alloys and its influencing factors

机译:几种早期过渡金属基合金的MRI兼容性及其影响因素

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Magnetic resonance imaging (MRI) compatibility of three early transition metal (ETM) based alloys was assessed in vitro with agarose gel as a phantom, including Zr-20Nb, near-equiatomic (TiZrNbTa)(90)Mo-10 and Nb-60Ta-2Zr, together with pure tantalum and L605 Co-Cr alloy for comparison. The artifact extent in the MR image was quantitatively characterized according to the maximum area of 2D images and the total volume in reconstructed 3D images with a series of slices under acquisition by fast spin echo (FSE) sequence and gradient echo (GRE) sequence. It was indicated that the artifacts extent of L605 Co-Cr alloy with a higher magnetic susceptibility ((v)) was approximately 3-fold greater than that of the ETM-based alloys with (v) in the range of 160-250 ppm. In the ETM group, the MRI compatibility of the materials can be ranked in a sequence of Zr-20Nb, pure tantalum, (TiZrNbTa)(90)Mo-10 and Nb-60Ta-2Zr. In addition, using a rabbit cadaver with the implanted tube specimens as a model for ex vivo assessment, it was confirmed that the artifact severity of Nb-60Ta-2Zr alloy is significantly reduced in comparison with the L605 alloy. (c) 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 377-385, 2018.
机译:用琼脂糖凝胶评估三种早期过渡金属(ETM)基合金的磁共振成像(MRI)相容性,作为琼脂糖凝胶作为幽灵,包括Zr-20nb,近赤症(Tizrnbta)(90)Mo-10和Nb-60ta- 2ZR,与纯钽和L605 CO-CR合金一起进行比较。根据2D图像的最大面积和通过快速旋转回波(FSE)序列和梯度回波(GRE)序列,根据2D图像的最大面积和重建的3D图像中的总体积的最大面积和总体积的定量表征MR图像中的伪影范围。结果表明,具有较高磁化率((v))的L605 CO-Cr合金的伪影程度大约大于160-250ppm的Etm基合金的3倍。在ETM组中,材料的MRI相容性可以以ZR-20NB,纯钽,(TizrnBTA)(90)MO-10和NB-60TA-2ZR的序列排序。此外,使用具有植入管样本的兔子尸体作为exvivo评估的模型,证实了与L605合金相比,Nb-60TA-2ZR合金的伪影严重程度显着降低。 (c)2017年Wiley期刊,Inc。J生物保解员B:苹果生物摩特,106B:377-385,2018。

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