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APPARATUS AND METHOD FOR JOINT-EDGE-PRESERVING REGULARIZATION TO REDUCE NOISE IN FOUR-DIMENSIONAL COMPUTED TOMOGRAPHY IMAGES
APPARATUS AND METHOD FOR JOINT-EDGE-PRESERVING REGULARIZATION TO REDUCE NOISE IN FOUR-DIMENSIONAL COMPUTED TOMOGRAPHY IMAGES
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机译:用于减少四维计算机断层图像中的噪声的联合保留边缘的调整的装置和方法
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摘要
A method and apparatus is provided to denoise computed tomography (CT) sinograms and reconstructed images by minimizing a penalized-weighted-least-squares objective function that includes a joint-edge-preserving regularization term. Common information shared among a series of related image and/or sinograms can beneficially be used to more accurately identify edges common to all of the image and/or sinograms. Thus, a joint edge preserving regularizer that relies on information from a series of three-dimensional constituents of a four-dimensional image, such as a time series of images in a CT profusion study or an energy series of images in spectral CT, can improve image quality by better preserving edges while simultaneously denoising the constituent images.
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