Small tip angle three-dimensional tailored radiofrequency slab-select pulse for reduced B1 inhomogeneity at 3 T

被引：81

作者：

Saekho, S

Boada, FE

Noll, DC

Stenger, VA

机构：

[1] Univ Pittsburgh, MR Res Ctr, Dept Bioengn, Pittsburgh, PA 15213 USA

[2] Univ Pittsburgh, Dept Radiol, Pittsburgh, PA 15260 USA

[3] Univ Michigan, Dept Biomed Engn, Ann Arbor, MI USA

来源：

MAGNETIC RESONANCE IN MEDICINE | 2005年 / 53卷 / 02期

关键词：

high field MRI; B-1; inhomogeneity; tailored RF pulses; small tip-angle approximation; structural brain MRI;

D O I：

10.1002/mrm.20358

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];

摘要：

This work presents a small tip-angle 3D tailored RF slab-select pulse for reducing the B-1 field inhomogeneity at 3T. The compensated slice profile was determined from a B-1 inhomogeneity map. SNR improvement and degree of artifact reduction were evaluated in a NiCl2 doped phantom and human brains. The technique was found to reduce inhomogeneities as large as 30% of the peak image magnitude in all three spatial directions in the brain using a standard head coil. (C) 2005 Wiley-Liss, Inc.

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收藏

页码：479 / 484

页数：6

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