RASEE - A RAPID SPIN-ECHO PULSE SEQUENCE

被引：17

作者：

BOGDAN, AR ^{[1
]}

JOSEPH, PM ^{[1
]}

机构：

[1] UNIV PENN,DEPT RADIOL,308 MED EDUC BLDG,36TH & HAMILTON WALK,PHILADELPHIA,PA 19104

来源：

MAGNETIC RESONANCE IMAGING | 1990年 / 8卷 / 01期

关键词：

Artifacts; Fast imaging; Gradient echo; Kidney contrast;

D O I：

10.1016/0730-725X(90)90206-H

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：

Most fast-imaging sequences use gradient echoes and a low flip-angle excitation. The low flip angle is used because it gives increased signal when TR < T1. However, spin-echo sequences are less productive of certain artifacts, among them flow and magnetic susceptibility artifacts. We present a modification of the spin-echo pulse sequence designed to optimize the signal-to-noise ratio for repetition times (TR) less than 100 msec while preserving good image quality. Our implementation performs a 128 × 128 image in under 7 sec (TR = 50 msec) and has been used to follow the dynamics of Gd-DTPA in the rat kidneys. © 1990.

引用

页码：13 / 19

页数：7

共 14 条

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[2]

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[3]

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[4]

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[5]

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[6]

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[8]

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[9]

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[10]

Lee, Cho, Full utilization of the echo and FID signal in SSFP fast NMR imaging, SMRM, 460, (1987)

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