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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