Magnetization structure contrast based on intermolecular multiple-quantum coherences
Magnetization structure contrast based on intermolecular multiple-quantum coherences
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DOI：
10.1002/mrm.10293
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发表时间：
2002-12-01
影响因子：
3.3
通讯作者：
Warren, WS
中科院分区：
文献类型：
--
作者：
Bouchard, LS;Rizi, RR;Warren, WS
基于分子间多量子相干性 (iMQC) 的体内和离体 MRI 预计将为 MRI 提供根本不同的对比源。本文研究了图像对比度对异质材料相关距离选择的依赖性。当相关距离与圆柱体之间的间隙尺寸相当时，使用紧密排列的平行空心圆柱体阵列来演示信号强度变化。观察到的效应与非线性布洛赫方程下磁化强度时间演化的三维计算非常吻合。
In vivo and ex vivo MRI based on intermolecular multiple-quantum coherences (iMQC) is predicted to provide a fundamentally different source of contrast for MRI. This article investigates the dependence of image contrast upon the choice of correlation distance for a heterogeneous material. A closely packed array of parallel hollow cylinders was used to demonstrate signal intensity variations when the correlation distance becomes comparable to the gap size between the cylinders. The observed effects agree well with three-dimensional calculations of the time evolution of magnetization under the nonlinear Bloch equations.