Theory and application of static field inhomogeneity effects in gradient-echo imaging

被引：232
作者：
Reichenbach, JR
Venkatesan, R
Yablonskiy, DA
Thompson, MR
Lai, S
Haacke, EM
机构：
[1] Mallinckrodt Institute of Radiology, Washington University, St. Louis, MO 63110
[2] Dept. of Biomed. and Biol. Eng., Washington University, St. Louis
[3] Department of Physics, Case Western Reserve University, Cleveland
[4] Lucas MRS Imaging Center, Stanford University, Stanford
来源：
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1997年 / 7卷 / 02期
关键词：
artifact; rapid imaging; phase imaging; K space; image processing; brain;
D O I：
10.1002/jmri.1880070203
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
The influence of local static magnetic field inhomogeneities on gradient-echo imaging is discussed and the underlying theoretical aspects are reviewed, A high-resolution approach is suggested to suppress image distortion and restore signal loss due to spin dephasing. Acquisition of three-dimensional data sets not only overcomes part of the limitations associated with gradient echoes but also makes it possible to extract local information about the strength or direction of background gradients and relative susceptibility changes between different tissues. Applications of the suggested approach in the human brain for anatomical imaging as well as for extraction of physical and physiological parameters are presented and discussed.
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页码：266 / 279
页数：14
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