Open-Source Algorithm for Automatic Magnetic Susceptibility Determination from Field Maps

Motivation: The magnetic susceptibility is a fundamental material property for MR and NMR equipment engineering. The literature provides several theoretical solutions to measure the magnetic susceptibility. However, an openly available implementation that allows to determine the magnetic susceptibility automatically is missing. Goal(s): Develop a non-proprietary approach to determine the magnetic susceptibility from measured field maps. Approach: Measure the field map of a cylindrical sample. Develop a Python program to extract the magnetic susceptibility of the sample. Results: The measured reference samples reflect the magnetic susceptibility of the literature. Code for data processing is available through the open access repository. Impact: Our research provides a programmatic solution to automatically determine the magnetic susceptibility of cylindrical samples from field map measurements in MRI systems. This will aid MR and NMR equipment engineers to measure the magnetic susceptibility of any material of interest.