A method of RF inhomogeneity correction in MR imaging |
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Authors: | Hiroaki Mihara Norio Iriguchi Shogo Ueno |
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Affiliation: | (1) Graduate School of Medicine, University of Tokyo, 7-3-1 Hongou, Bunkyouku, 113 Tokyo, Japan |
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Abstract: | A direct postprocessing method for correcting RF inhomogeneity in MR imaging is proposed. First, two images with different flip-angles of ψ and 2ψ are obtained. Next, the spatial distribution maps of the sensitivity of the surface coil and theB 1 field intensity are produced by employing those images. Finally, the correction of the MR image is achieved, dividing the original image by distribution maps of the coil sensitivity and theB 1 field intensity. The method was applied to image obtained by a gradient echo sequence and the corrected image is presented. |
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Keywords: | MRI RF inhomogeneity correction Post-acquisition inhomogeneity correction Flip angle Surface coil |
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