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Abstract #1490

Multiple‑TR neuronal resonance-MRI (NR-MRI) for detection of weak oscillating magnetic field

Ki Hwan Kim1,2, Hyo-Im Heo1, and Sung-Hong Park1,2

1Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, Republic of, 2Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, Republic of

We propose a new approach termed neuronal resonance MRI (NR-MRI) with multiple TRs for detection of weak oscillating magnetic field. NR MRI could detect signals from oscillating magnetic fields with random frequency, phase, and on/off intervals, without synchronization between MR acquisition and neuronal oscillation. The detected signals showed higher SNR with increasing number of dynamic scans, demonstrating that temporal averaging is possible with NR-MRI. Two‑TR approach showed multiple frequency components in an absolute frequency spectrum with no a priori target frequency information while suppressing the systematic noises, which warrants further investigation.

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