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FAST SPARSE COMPUTED TOMOGRAPHY IMAGE RECONSTRUCTION FROM FEW VIEWS
FAST SPARSE COMPUTED TOMOGRAPHY IMAGE RECONSTRUCTION FROM FEW VIEWS
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机译:从少数几个视图中进行快速稀疏的CT图像重建
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摘要
A method for performing Computed Tomography (CT) reconstruction includes acquiring a sparse measurement matrix using a CT scanner and applying a reconstruction process over a number of iterations to reconstruct image data from the sparse measurement matrix. The reconstruction process performed during each respective iteration includes generating a random view subset and determining a portion of the sparse measurement matrix corresponding to the random view subset. The reconstruction process further includes performing a stochastic gradient descent on the portion of the sparse measurement matrix to yield an image, applying a proximal total variation regularization to the image, and adjusting a step size associated with the stochastic gradient descent.
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