Out-and-in spiral spectroscopic imaging in rat brain at 7 T

被引:18
作者
Hiba, B [1 ]
Faure, B [1 ]
Lamalle, L [1 ]
Décorps, M [1 ]
Ziegler, A [1 ]
机构
[1] Univ Grenoble 1, INSERM U594, Lab Mixte, F-38043 Grenoble 9, France
关键词
chemical shift imaging; spiral spectroscopic imaging; in vivo; rat brain; high magnetic field;
D O I
10.1002/mrm.10622
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
With standard spectroscopic imaging, high spatial resolution is achieved at the price of a large number of phase-encoding steps, leading to long acquisition times. Fast spatial encoding methods reduce the minimum total acquisition time. In this article, a k-space scanning scheme using a continuous series of growing and shrinking, or "out-and-in," spiral trajectories is implemented and the feasibility of spiral spectroscopic imaging for animal models at high B-0 field is demonstrated. This method was applied to rat brain at 7 T. With a voxel size of about 8.7 mul (as calculated from the point-spread function), a 30 x 30 matrix, and a spectral bandwidth of I I kHz, the minimum scan time was 9 min 20 sec for a signal-to-noise ratio of 7.1 measured on the N-acetylaspartate peak. (C) 2003 Wiley-Liss, Inc.
引用
收藏
页码:1127 / 1133
页数:7
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