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什么叫横向弛豫?

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2022-01-04 13:34
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正确答案

横向弛豫,又称自旋--自旋弛豫、T2弛豫。T2表示在完全均匀的外磁场中横向磁化所维持的时间。T2值是指横向磁化矢量衰减到其原来值37%的时间,它无能量的散出。T2值越长,MR信号高,T2值越短,MR信号低。磁共振信号对比主要依赖T2图像。


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