Metal Implant-Induced Spectral Range Optimization using Rapid 3D-MSI Calibration Scans

3D Multi-Spectral Imaging (3D-MSI) techniques, such as MAVRIC, SEMAC, and MAVRIC SL collect multiple independently spatial-encoded images at discrete Larmor frequency offsets. Prospective knowledge of the range and location of off-resonant spins can aid in optimizing the efficiency of these sequences. Here we present a concept of 3D-MSI calibration scanning that can provide such information through an acquisition on the order of 1 minute. In addition, we demonstrate a practical method to automatically determine off-resonance frequency ranges determination using such calibration data. For many implant cases of lower magnetic susceptibility materials, such a calibration and off-resonance range computation can substantially improve the efficiency of 3D-MSI techniques.

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