Spectral quality control in motion-corrupted single-voxel J-difference editing scans: An interleaved navigator approach

被引:32
作者
Bhattacharyya, P. K. [1 ]
Lowe, M. J. [1 ]
Phillips, M. D. [1 ]
机构
[1] Cleveland Clin Fdn, Div Radiol, Cleveland, OH 44195 USA
关键词
motion; J-difference editing; interleaved navigator scan; GABA;
D O I
10.1002/mrm.21337
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
Motion has an adverse effect on spectral quality and needs to be properly identified in MR spectroscopy (MRS) scans. Spectral subtraction-based techniques like J-difference editing are prone to be affected more by subject motion where motion can result in false peaks or inefficient subtraction of peaks. Introducing a water signal-based interleaved navigator scan in the MEGA point-resolved spectroscopy (MEGA-PRESS) sequence and acquiring data on a shot-by-shot basis, subject motion inside a scanner was tracked and motion-corrupted data were identified and excluded from the dataset. Performing a T-aminobutyric acid (GABA) editing scan at the occipital cortex, it was possible to retrieve a properly edited GABA spectrum from a dataset otherwise to be discarded due to motion. This study demonstrates the importance of independent motion assessment in J-difference editing.
引用
收藏
页码:808 / 812
页数:5
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