Deep Back Projection for Sparse-View CT Reconstruction

Autor:	Ye, Dong Hye, Buzzard, Gregery T., Ruby, Max, Bouman, Charles A.
Rok vydání:	2018
Předmět:	Electrical Engineering and Systems Science - Image and Video Processing Computer Science - Computer Vision and Pattern Recognition
Druh dokumentu:	Working Paper
Popis:	Filtered back projection (FBP) is a classical method for image reconstruction from sinogram CT data. FBP is computationally efficient but produces lower quality reconstructions than more sophisticated iterative methods, particularly when the number of views is lower than the number required by the Nyquist rate. In this paper, we use a deep convolutional neural network (CNN) to produce high-quality reconstructions directly from sinogram data. A primary novelty of our approach is that we first back project each view separately to form a stack of back projections and then feed this stack as input into the convolutional neural network. These single-view back projections convert the encoding of sinogram data into the appropriate spatial location, which can then be leveraged by the spatial invariance of the CNN to learn the reconstruction effectively. We demonstrate the benefit of our CNN based back projection on simulated sparse-view CT data over classical FBP. Comment: GlobalSIP 2018
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1807.02370 Zobrazit plný text záznamu View this record from Arxiv