TISSUE PERFUSION IN HUMANS STUDIED BY FOURIER VELOCITY DISTRIBUTION, LINE SCAN, AND ECHO-PLANAR IMAGING
TISSUE PERFUSION IN HUMANS STUDIED BY FOURIER VELOCITY DISTRIBUTION, LINE SCAN, AND ECHO-PLANAR IMAGING
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DOI：
10.1002/mrm.1910160209
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发表时间：
1990-11-01
影响因子：
3.3
通讯作者：
JAKAB, PD
中科院分区：
文献类型：
--
作者：
FEINBERG, DA;JAKAB, PD
在组织灌注研究中，FT 速度分布成像 (VDI) 从本质上区分来自移动血液和体积平均组织的信号。使用 VDI 线扫描技术在人甲状腺体内的结果表明，移动的血液信号与腺体组织分离，而大脑的 VDI 内体积回波平面成像仅显示脑脊液速度高于图像噪声水平。讨论了允许扩散和慢速分离的新的交替极性梯度序列。演示了一种新颖的 3D FT 成像方法（两个空间维度和一个速度维度），结合了内部体积成像和回波平面成像，速度分辨率为每像素 0.15 mm/s。提出了一种计算和显示脉冲梯度序列中扩散依赖性的新颖图形方法。
In tissue perfusion studies, FT velocity distribution imaging (VDI) intrinsically distinguishes signals from moving blood and volume-averaged tissue. Results in human thyroid gland, in vivo, using VDI line scan technique demonstrated separation of moving blood signal from glandular tissue, while VDI inner-volume echo-planar imaging of brain showed only CSF velocity above the image noise level. New alternating polarity gradient sequences which permit separation of diffusion and slow velocity are discussed. A novel method of 3D FT imaging (two spatial and one velocity dimension) combining inner-volume imaging and echo-planar imaging with velocity resolution of 0.15 mm/s per pixel is demonstrated. A novel graphical method of calculation and display of diffusion dependence in pulsed gradient sequences is presented.