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Abstract #4384

Bloch Equation Based Algebraic Reconstruction for MRI using Frequency-Modulated Pulses

Naoharu Kobayashi1, Steen Moeller1, Jang-Yeon Park2, Michael Garwood1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States; 2School of Biomedical Engineering, College of Biomedical & Health Science, Konkuk University, Chungju, Korea, Republic of

A Bloch equation based algebraic reconstruction method applied to concurrent dephasing and excitation (CODE) with frequency-modulated (FM) pulse excitation is introduced. Compensation of the quadratic phase generated by FM excitation has been performed based on a linear approximation of the spin system. However, the actual spin system has non-linearity in its time evolution that is described by the Bloch equation. Therefore, incorporation of the non-linearity into the reconstruction method should improve the image quality. Here, we show the computer simulation and reconstructed images of experimental data acquired on a 16.4 T MRI system.