金属冠脉支架磁共振适用性检测方法  

Methods of Magnetic Resonance Compatibility Testing for Metal Coronary Stents

作　　者：王迎[1] 刘丽[1] 王硕[1] 尚汝瑶[1] 王春仁[1] 

机构地区：[1]中国食品药品检定研究院,北京100050

出　　处：《中国药事》2015年第1期99-103,共5页Chinese Pharmaceutical Affairs

基　　金：国家科技支撑计划课题"新型及高风险医疗器械检测与安全性评价技术研究(编号2012BAI22B01)";国家科技支撑计划课题"植介入体生物力学及耐久性测试技术及系统(编号2012BAI22B02)"

摘　　要：目的:建立金属冠脉支架磁共振适用性实验平台,以实验室测试为基础,研究金属冠脉支架的磁共振适用性。方法:金属冠脉支架磁共振适用性试验分为四个部分,在3T磁共振环境下,分别进行磁位移力试验、磁扭矩试验、致热试验和图像干扰试验。结果:退磁效果好的金属冠脉支架,磁位移力小于其自身重力,磁扭矩小于其自身重力扭矩,温度升高值小,图像畸变值小。退磁效果不好的支架,磁位移力大于其自身重力,温度升高多,图像畸变值大。结论:实验平台可以对金属冠脉支架磁共振适用性进行检测,并对其退磁效果进行评价。Objective： To establish an experimental platform for magnetic resonance compatibility for mental coronary stents and to study the magnetic resonance compatibility based on laboratory testing. Methods： The magnetic resonance compatibility testing for metal coronary stents was divided into four parts, which was conducted in the 3T magnetic resonance imaging environment, including magnetically induced displacement force test, magnetically induced torque test, heating test and image interference test. Results： For metal coronary stents with good demagnetization effect, the magnetically induced displacement force was lower than its own gravity, the magnetically induced torque was lower than its gravity-induced torque, its temperature increased in low amplitude, and the value of image distortion was small. By contrast for metal coronary stents with poor demagnetization effect, the magnetically induced displacement force was higher than its own gravity, the increase amplitude of its temperature was high, and the value of image distortion was large. Conclusion： The experimental platform can be applied to test magnetic resonance compatibility for coronary mental stents and evaluate its demagnetization effect.

关 键 词：金属冠脉支架 磁共振适应性 磁位移力 磁扭矩 射频致热 图像干扰 

分 类 号：R318.08[医药卫生—生物医学工程]