MINIMIZING TE IN MOMENT-NULLED OR FLOW-ENCODED 2-DIMENSIONAL AND 3-DIMENSIONAL GRADIENT-ECHO IMAGING

被引：80

作者：

BERNSTEIN, MA

SHIMAKAWA, A

PELC, NJ

机构：

[1] Applied Science Laboratory, W-875, GE Medical Systems, Waukesha, Wisconsin, 53188

[2] Advanced Applications, GE Medical Systems, Waukesha, Wisconsin, 53188

[3] Department of Radiology, Stanford University School of Medicine, Stanford, California

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1992年 / 2卷 / 05期

关键词：

GRADIENT WAVE-FORMS; MODEL; MATHEMATICAL; PHASE IMAGING; PULSE SEQUENCES; RAPID IMAGING; 3-DIMENSIONAL IMAGING; VASCULAR STUDIES;

D O I：

10.1002/jmri.1880020517

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：

A method for minimizing field-echo delay in moment-nulled gradient-echo imaging is presented. Even though ramps are accounted for, the analysis yields simple closed-form solutions. The method is then generalized to the section-select waveform for three-dimensional volume imaging and to flow encoding for phase-contrast imaging. Three strategies for first-moment selection in phase-contrast imaging are discussed, including a new strategy that always yields the minimum echo delay. Trapezoidal and triangular gradient lobe shapes are analyzed.

引用

页码：583 / 588

页数：6

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