MRI磁兼容合金研究

MRI磁兼容合金研究A REVIEW: RESEARCH ON MR-COMPATIBLE ALLOYS IN MRI

MRI是醫(yī)學(xué)領(lǐng)域中不可或缺的影像診斷技術(shù)。目前常規(guī)使用的金屬醫(yī)療器械包括植入物在MRI下均會產(chǎn)生較大程度的偽影，影響病理診斷分析。盡管臨床上通過技術(shù)操作可以減小金屬偽影，但偽影仍然無法完全消除。本文綜述了目前MRI磁兼容合金的研究進展，包括鋯合金、鈮合金、銅合金等。與臨床應(yīng)用的醫(yī)用金屬材料相比，本文所述磁兼容合金均能有效降低或消除MRI下的金屬偽影。隨著MRI診斷技術(shù)的普及，可在MRI下精確診斷的生物材料與器械會越來越受到重視，因此開發(fā)綜合性能優(yōu)異的磁兼容合金是醫(yī)用金屬材料的發(fā)展趨勢之一。

Magnetic resonance imaging (MRI) is widely used in clinical applications. Metallic medical devices and implants used under MRI normally produce noticeable artifact which seriously affects image quality. Therefore, the artifact is an essential problem that should be solved for metallic biomaterials. Although artifact can be reduced by technical manipulation, it cannot be eliminated completely. This paper summarizes recent studies on MR-compatible alloys such as Zr alloys, Nb alloys and Cu alloys. Compared with normally clinical metallic materials, MR-compatible alloys described in this article can effectively reduce or eliminate artifacts under MRI. MR-compatibility will become an essential property to implant materials and devices. Thus developing metallic biomaterials with low magnetic susceptibility and excellent comprehensive performance becomes more important.

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