Abstract #1936

Fast simulation of off-resonance artifacts in MRI using FORECAST (Fourier-based Off-REsonanCe Artifact Simulation in the STeady-State)

Frank Zijlstra¹, Job G Bouwman¹, Ieva Braškutė¹, and Peter R Seevinck¹

¹Image Sciences Institute, UMC Utrecht, Utrecht, Netherlands

We present a fast alternative to Bloch simulation for simulation of off-resonance artifacts in steady-state imaging. By assuming a steady-state, the signal equation can be quickly evaluated by using multiple Fast Fourier Transforms. We show an acceleration factor of over 350 for a 2D simulation of a titanium cylinder phantom, while the differences with Bloch simulation were minor. The speed of the proposed method enables 3D simulations at high resolution and may benefit various applications.

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