二値化磁化率マップデータを用いたマジックアングル領域置換法によるMRI定量的磁化率マッピング

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  • MRI Quantitative Susceptibility Mapping Using Replacement of Magic Angle Domain in k‐space by a Domain Calculated from a Binary Susceptibility Distribution Image

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Quantitative susceptibility mapping（QSM）of tissue using MRI phase data has recently received increasing scientific and clinical attention. QSM requires deconvolution of the phase data with dipole kernel. However this problem is ill‐posed. To overcome this challenge, we proposed a new method that replaces the magic angle domain in k‐space by the corresponding domain calculated from a 3‐D magnitude image with a binary susceptibility distribution. We successfully applied the method to a numerical head model and showed improved results compared with a previous method. The proposed method yielded a better solution for the RMSE, error, standard deviation, and SNR.

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