Abstract #2511
Metal Implant-Induced Spectral Range Optimization using Rapid 3D-MSI Calibration Scans
Kevin M Koch 1
1
Biophysics and Radiology, Medical College of
Wisconsin, Milwaukee, WI, United States
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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