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Abstract #1587

Image-based estimation method for field inhomogeneity map in brain EPI image

Seiji Kumazawa 1 , Takashi Yoshiura 2 , Hiroshi Honda 2 , and Fukai Toyofuku 1

1 Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka, Fukuoka, Japan, 2 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Fukuoka, Japan

EPI suffers from geometrical distortion due to magnetic field inhomogeneity. Our purpose was to develop an image-based method for estimating the magnetic field map based on the distorted EPI image and T1WI which requires no additional acquisitions. Our method synthesizes the distorted image to match the measured EPI image through the generating process of EPI image by changing the magnetic field. To evaluate the performance of our method, we applied it to simulation data. Our preliminary results demonstrate that the magnetic field inhomogeneity in EPI image can be estimated by our method without any additional acquisitions for estimation of the field map.

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