SEPARATION OF FAT AND WATER IN FAST SPIN-ECHO MR-IMAGING WITH THE 3-POINT DIXON TECHNIQUE

被引：79

作者：

HARDY, PA ^{[1
]}

HINKS, RS ^{[1
]}

TKACH, JA ^{[1
]}

机构：

[1] GE CO,MED SYST,MILWAUKEE,WI 53201

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1995年 / 5卷 / 02期

关键词：

IMAGE PROCESSING; PHASE IMAGING; PULSE SEQUENCES; RAPID IMAGING; TISSUE SUPPRESSION;

D O I：

10.1002/jmri.1880050213

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 suppressing fat in fast spin-echo imaging with the three-point Dixon technique is described. The method differs from the three-point Dixon method used in conventional spin-echo imaging in that the readout gradient instead of a radio-frequency pulse is shifted. This method preserves the Carr-Purcell-Meiboom-Gill nature of the fast spin-echo sequence and hence is less sensitive to magnetic field inhomogeneities and resonance frequency mistuning. As in the original three-point Dixon technique used in conventional spin-echo imaging, three acquisitions are required to estimate the field inhomogeneity and completely separate fat and water. The extra time required is not excessive considering that the fast spin-echo method is frequently applied with multiple signal acquisition. Also, this technique achieves an expected signal-to-noise ratio comparable to 2.67 signal acquisitions, which is approximately 94% of the signal-to-noise ratio obtained with three signal acquisitions. The method is demonstrated with applications to phantoms and a human volunteer.

引用

页码：181 / 185

页数：5

共 15 条

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