发明名称 |
Medical devices having MRI compatible metal alloys |
摘要 |
An MRI compatible medical device includes a non-magnetic metal alloy portion including a first and at least a second metal. A surface of the metal alloy portion includes an integral MRI heating resistant surface structure having a thickness>=3 nanometers. The MRI heating resistant surface structure includes one or more of (i) a matrix phase including the first and second metal having a plurality of nanometer or micron scale particles, precipitates and/or inclusions constituting a volume fraction>=3%, wherein the particles, precipitates or inclusions differ in chemical composition and physical characteristics of the matrix phase and are discontinuously distributed therein; (ii) a level of crystallinity at least 5% less as compared to a level of crystallinity in the bulk of the metal alloy portion; (iii) one or more metal atoms different from the first and second metal having a concentration profile evidencing diffusion into the metal alloy portion. |
申请公布号 |
US8644951(B1) |
申请公布日期 |
2014.02.04 |
申请号 |
US20090629723 |
申请日期 |
2009.12.02 |
申请人 |
VAIDYANATHAN RAJAN;LARSSON STINA CECILIA;UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC. |
发明人 |
VAIDYANATHAN RAJAN;LARSSON STINA CECILIA |
分类号 |
A61L31/18;A61F2/06;A61L31/14 |
主分类号 |
A61L31/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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