金属冠脉支架磁共振适用性检测方法-中国药事.PDF

中国药事 2015 年 1 月 第 29 卷 第 1 期 99 金属冠脉支架磁共振适用性检测方法 * 王迎 , 刘丽 , 王硕 , 尚汝瑶 , 王春仁 （中国食品药品检定研究院，北京 100050） 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。 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 中图分类号：R318.08 文献标识码：A 文章编号：1002-7777(2015)01-0099-05 Methods of Magnetic Resonance Compatibility Testing for Metal Coronary Stents * Wang Ying, Liu Li, Wang Shuo, Shang Ruyao, Wang Chunren (National Institutes for Food and Drug Control, Beijing 100050 China) ， Abstract 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