Eliminating image shading in 3D FSE with hybrid RF

In hybrid 3D FSE, the close proximity of pre-phaser and the first refocus pulse makes the first refocus RF very vulnerable to the short-term eddy current induced by the pre-phaser. This causes image shadings in regions distant from the magnet center. We propose to shift the position of pre-phaser to post of the first refocus RF to eliminate the image shading of hybrid 3D FSE sequence.

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