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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