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Abstract #0641

High B1 Efficiency with Uniform Image Contrast in 3D FFE & TSE at 7T.

MAGNA25Irene Maria Louise van Kalleveen1, Vincent O. Boer1, Peter Luijten1, Dennis W.J. Klomp1

1Radiology, UMC Utrecht, Utrecht, Netherlands

In high field clinical MRI the B1 field is limited and inhomogeneous, while RF power deposition is high. Surface coils can improve the B1 efficiency, however the B1 field becomes even more inhomogeneous. As the inhomogeneity is mainly dominant in one dimensional, we designed a 1D compensating RF pulse derived from a B1 map. In combination with slab selective gradients the RF pulse will provide a uniform flip angle as demonstrated by 3D FFE and 3D TSE in the human breast.

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Keywords

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