ENCODING STRATEGIES FOR 3-DIRECTION PHASE-CONTRAST MR IMAGING OF FLOW

被引：331

作者：

PELC, NJ

BERNSTEIN, MA

SHIMAKAWA, A

GLOVER, GH

机构：

[1] Department of Diagnostic Radiology and Nuclear Medicine, Stanford University School of Medicine, Stanford, California, 94305-5105

[2] GE Medical Systems, Waukesha, Wisconsin

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1991年 / 1卷 / 04期

关键词：

FLOW IMAGING; IMAGE PROCESSING; MODEL; MATHEMATICAL; PHASE-CONTRAST IMAGING; PHYSICS; 3-DIMENSIONAL IMAGING;

D O I：

10.1002/jmri.1880010404

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：

Three encoding strategies for the measurement of flow velocities in arbitrary directions with phase-contrast magnetic resonance imaging are presented; their noise and dynamic range performance are compared by means of theoretical analysis and computer simulation. A six-point measurement strategy is shown to be quite inefficient in terms of velocity variance per unit time. A simple four-point method exhibits equal dynamic range; its noise depends on flow direction but on average is equal to that of the six-point method. Am alternate, balanced four-point method has noise that is direction independent and has, depending on implementation, possibly lower noise levels. Either four-point method is more efficient and is preferred over the six-point approach.

引用

页码：405 / 413

页数：9

共 15 条

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