In vivo free induction decay based 3D multivoxel longitudinal hadamard spectroscopic imaging in the human brain at 3 T.
In vivo free induction decay based 3D multivoxel longitudinal hadamard spectroscopic imaging in the human brain at 3 T.
复制标题
基于体内自由感应衰变的 3D 多体素纵向哈达玛光谱成像，在 3 T 下人脑中进行。
DOI：
10.1002/mrm.24327
复制
发表时间：
2013
影响因子：
3.3
通讯作者：
Gonen,Oded
中科院分区：
文献类型：
--
作者：
Tal,Assaf;Goelman,Gadi;Gonen,Oded
We propose and demonstrate a full 3D longitudinal Hadamard spectroscopic imaging scheme for obtaining chemical shift maps, using adiabatic inversion pulses to encode the spins' positions. The approach offers several advantages over conventional Fourier‐based encoding methods, including a localized point spread function; no aliasing, allowing for volumes of interest smaller than the object being imaged; an option for acquiring noncontiguous voxels; and inherent outer volume rejection. The latter allows for doing away with conventional outer volume suppression schemes, such as point resolved spectroscopy (PRESS) and stimulated echo acquisition mode (STEAM), and acquiring non‐spin‐echo spectra with short acquisition delay times, limited only by the excitation pulse's duration. This, in turn, minimizesT2decay, maximizes the signal‐to‐noise ratio, and reduces J‐coupling induced signal decay. Results are presented for both a phantom and an in vivo healthy volunteer at 3 T. Magn Reson Med 69:903–911, 2013. © 2012 Wiley Periodicals, Inc.
