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Abstract #3182

Resolution improvement in Quantitative Susceptibility Mapping by denser sampling of spatial dipole field

Yuya Umemoto 1 , Mai Murashima 2,3 , Tomohiro Ueno 2 , and Naozo Sugimoto 2

1 Faculty of Medicine, Kyoto University, Kyoto, Kyoto, Japan, 2 Graduate of Medicine, Kyoto University, Kyoto, Kyoto, Japan, 3 present address Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan

In Quantitative Susceptibility Mapping, susceptibility distribution can be obtained by deconvolving a perturbed magnetic field with a spatial unit dipole field. The spatial dipole field has a rapid changing nature. In this study, we employed a denser sampled dipole field in the deconvolving process to improve spatial resolution of QSM. We created Shepp-Logan phantom including partial volume effects and used as a low resolution input data. A Fourier-transformed dipole field with high resolution was created analytically, and a perturbed field was expanded by the nearest neighbor method. With the proposed method, a susceptibility map with higher spatial resolution was obtained.

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