首页 | 本学科首页   官方微博 | 高级检索  
     


Out-and-in spiral spectroscopic imaging in rat brain at 7 T.
Authors:Bassem Hiba  Bérengère Faure  Laurent Lamalle  Michel Décorps  Anne Ziegler
Affiliation:Laboratoire mixte INSERM U594 / Université Joseph Fourier Neuroimagerie fonctionnelle et métabolique, Laboratoire de Recherche Conventionné (30V) du CEA, Centre Hospitalier Universitaire, Grenoble, France.
Abstract:
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 microl (as calculated from the point-spread function), a 30 x 30 matrix, and a spectral bandwidth of 11 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.
Keywords:chemical shift imaging  spiral spectroscopic imaging  in vivo  rat brain  high magnetic field
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号