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Abstract #3697

The Effects of Coupled B1 Fields in B1 Encoded TRASE MRI – A Simulation Study

Pallavi Bohidar1, Hongwei Sun2, Jonathan C. Sharp2, and Gordon E. Sarty1
1Division of Biomedical Engineering, University of Saskatchewan, Saskatoon, SK, Canada, 2Department of Oncology, University of Alberta, Edmonton, AB, Canada

Transmit Array Spatial Encoding (TRASE) is a novel MRI technique that achieves spatial encoding by introducing phase gradients in the transmit RF magnetic field (B1). In this study, Bloch simulations were performed to investigate and study the effects of B1 field perturbations arising from inductive coupling among RF coils for 2D TRASE imaging. Simulations show that a flip angle contribution of ~95% or higher from the primary (driven) transmit coil is required for 2D TRASE MRI. This result is of crucial importance for designers of practical TRASE transmit array systems.

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