Quantitative susceptibility mapping (QSM) is a technique which can provide quantitative values of magnetic susceptibility. In this study, we compared magnetic susceptibility values with computed tomography (CT) numbers of brain structures and intracranial lesions in 30 subjects. QSM was able to differentiate between paramagnetic and diamagnetic substances. Susceptibility values showed positive correlations with CT numbers in globus pallidus and lesions with positive susceptibility, and negative correlations in choroid plexus and lesions with negative susceptibility.
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