Creation of non-magnetism stent and aneurysm clip for high magnetic field MR imaging

在金铂合金的基础上添加一种新的金属元素，研制出一种三元合金。 首先，选择了新的金属元素Nb、Ir、Hf和Ta。 之后，Ir、Hf和Ta被排除，因为添加该元素的合金在MR成像中显示出明显的金属伪影。对于添加Nb的合金，根据含量，在MR成像中几乎看不到金属伪影。改变Pt和Nb的含量，并通过热处理方法的不同来尝试机械特性的改善。结论：Au-7 Nb-5 Pt合金是最佳的动脉瘤夹和支架材料。

A three component alloy was developed by adding a new metallic element based on an Au-Pt alloy made by the previous study. Firstly, new metallic elements, Nb, Ir, Hf and Ta were selected. After that Ir, Hf and Ta were excluded because the alloys added the element showed an obvious a metallic artifact in MR imaging. Concerning to an alloy added Nb, it was shown a metallic artifact was hardly seen in MR imaging according to the content. The content of Pt and Nb was changed and the improvement of a mechanical characteristic was tried by the difference of the heat-treatment method. It was concluded that Au-7Nb-5Pt alloy was optimum for aneurysm clip and stent.