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DOI：10.1002/mrm.10388.png)
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摘要
En 中文
The additional data acquired when using multiple receiver coils is commonly used to improve SNR or reduce acquisition times. It may also be used to remove image artifacts by selectively replacing corrupt data. In the present study, a correction scheme is presented based on simultaneous acquisition of spatial harmonics (SMASH) that enables detection and correction of motion artifacts caused by 2D translations. Newly measured data is compared with predictions from previously measured data by making negative and positive spatial harmonics. Differences are attributed to motion occurring in the interval between the acquisition of separate phase encode lines and correction parameters are determined. Two types of rigid body motion are considered: 1) object and coil array move, and 2) object only moves, since each causes different phase errors in k-space. Simulation, phantom, and volunteer experiments demonstrate the validity of the technique. (C) 2003 Wiley-Liss, Inc.
Keyword:
MRI
motion correction
SMASH
partially parallel imaging
navigation
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3
论文数:
1.2W
被引数:
3.1W
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Simultaneous acquisition of spatial harmonics (SMASH): Fast imaging with radiofrequency coil arrays同时采集空间谐波 (SMASH): 使用射频线圈阵列进行快速成像
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分享收藏Tailored SMASH image reconstructions for robust in vivo parallel MR imaging量身定制的SMASH图像重建，用于鲁棒的体内并行MR成像OAAI
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