Abstract:Image reconstruction from sparse fan-beam projection data would result in image error. In this paper, a hybrid imaging algorithm from sparse fan-beam projections is proposed. The first, high exact sparse spectrum data is extracted from image reconstruction from sparse fan-beam projections by filtered back-projection (FBP), and then image is reconstructed from the data using the iterative next neighbor regridding (INNG) algorithm combined with total variation (TV) gradient descent method. The INNG step can rest… Show more
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