3D multivoxel proton spectroscopy of human brain using a hybrid of 8th‐order hadamard encoding with 2D chemical shift imaging
作者:
Oded Gonen,
James B. Murdoch,
Radka Stoyanova,
Gadi Goelman,
期刊:
Magnetic Resonance in Medicine
(WILEY Available online 1998)
卷期:
Volume 39,
issue 1
页码: 34-40
ISSN:0740-3194
年代: 1998
DOI:10.1002/mrm.1910390108
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: proton;brain;localized spectroscopy;Hadamard;CSI
数据来源: WILEY
摘要:
AbstractMultivoxel 3D localized proton spectroscopy using a hybrid of 1D 8th‐order transverse Hadamard spectroscopic imaging (HSI) with 2D chemical shift imaging (CSI) is demonstrated in human brain. The spatially selective HSI pulse incorporates naturally into the PRESS sequence (TE= 135 ms), which then both excites an 8 × 8 × 6 cm parallelepiped volume of interest (VOI) and subdivides it into eight slices. The planes of these slices are further partitioned into 16 × 16 voxel arrays using 2D CSI to yield 8 × 8 × 8 voxels within the VOI. Simultaneous 3D coverage yields good voxel signal‐to‐noise (8, 12, and 22 for choline, creatine, andN‐acetylaspartate, respectively) from these 0.75‐ml voxels, in ˜45 min. The high spatial isolation allows localization to within less than 1 cm from the skull without fa
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