Correction of off resonance-related distortion in echo-planar imaging using EPI-based field maps
Correction of off resonance-related distortion in echo-planar imaging using EPI-based field maps
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DOI：
10.1002/mrm.1910390223
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发表时间：
1998-02-01
影响因子：
3.3
通讯作者：
Frank, LR
中科院分区：
文献类型：
--
作者：
Reber, PJ;Wong, EC;Frank, LR
We present, here, a simple method for measurement and correction of off-resonance related geometric distortion in echo-planar imaging (EPI), This method uses high signal-to-noise ratio (SNR) EPI-based field maps, rapidly acquired using a series of gradient recalled images collected across a range of TE values, This field map is distorted in the same manner as the EPI images to be unwarped, providing a direct look-up table for the correct location of each pixel of data, This method adds very little scan time and is robust and easy to implement.
