Model studies of nonsteady flow using magnetic resonance imaging.
Model studies of nonsteady flow using magnetic resonance imaging.
复制标题
使用磁共振成像的非定常流动模型研究。
DOI：
10.1115/1.2891132
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Fatouros,PP
中科院分区：
文献类型：
--
作者：
Fei,DY;Kraft,KA;Fatouros,PP
一个团注跟踪磁共振成像（MRI）方法已被用来测量速度分布的振荡流和不稳定的流动成分，以及脉动流在轴对称管模型。对正常生理限度内的一系列流动条件进行了测试。观察到的成像速度分布与理论预测基本雅阁。从MR图像计算的瞬时流速与使用超声波流量计评估的瞬时流速一致。由于MRI是非侵入性的，对受试者的风险很小，因此该技术对研究体内血管血流动力学具有潜在的用途。
A bolus-tracking magnetic resonance imaging (MRI) method has been employed to measure velocity profiles for oscillatory flow with and without a steady flow component as well as pulsatile flow in an axisymmetric tube model. A range of flow conditions within normal physiological limits was tested. The imaged velocity profiles were observed to be generally in accord with theoretical predictions. Instantaneous flow rates calculated from the MR images agreed well with those assessed using an ultrasonic flowmeter. Because MRI is noninvasive and poses few risks to subjects, this technique is potentially useful for studying vascular hemodynamics in vivo.