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Bias field estimation for intensity inhomogeneity correction in MR images
Bias field estimation for intensity inhomogeneity correction in MR images
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机译:MR图像中强度不均匀校正的偏置场估计
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摘要
An intensity inhomogeneity correction system includes a log operator which performs a log operation on the intensity values of the original MR image. A regular grid generator partitions the image domain and then a compute and select establishes reliable orientation constraints at grid locations. A bias field surface reconstructor reconstructs a bias field surface from selected orientation constraints with a thin-plate spline by using a preconditioned conjugate gradient. An intensity inhomogeneities remover subtracts an estimated bias function from the original log image and an exponential operation on the bias-field corrected log image provides a corrected image.
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