T2-shortening by strongly magnetized spheres:: A chemical exchange model
T2-shortening by strongly magnetized spheres:: A chemical exchange model
复制标题
DOI：
10.1002/mrm.10064
复制
发表时间：
2002-02-01
影响因子：
3.3
通讯作者：
Brooks, RA
中科院分区：
文献类型：
--
作者：
Brooks, RA
结果表明，化学交换模型可以重现由水分子在强磁化颗粒附近扩散引起的核磁弛豫。该协议基于回声限制机制中各自“访问限制”机制的相似性（但不等同）。该模型得出一个单一方程，可以预测运动平均和访问限制状态下的松弛行为。当与静态相移机制方程结合时，结果是一个涵盖整个扩散时间范围的简单理论（对于球体）。 Magn Reson Med 47:388-391, 2002。2002 年出版 Wiley-Liss, Inc.dagger
It is shown that a chemical exchange model can reproduce nuclear magnetic relaxation caused by diffusion of water molecules near strongly magnetized particles. The agreement is based on the similarity (but not equivalence) of the respective "visit-limiting" mechanisms in the echo-limited regime. The model leads to a single equation that predicts relaxation behavior in both the motional-averaging and visit-limited regimes. When combined with the static-dephasing regime equation, the result is a simple theory (for spheres) that covers the entire range of diffusion times. Magn Reson Med 47:388-391, 2002. Published 2002 Wiley-Liss, Inc.dagger