@inproceedings{033d52364a7a450184862588018be3e4,
title = "Noise reduction by projection direction dependent diffusion for low dose fan-beam x-ray computed tomography",
abstract = "We propose a novel method to reduce the noise in fan-beam computed tomography (CT) imaging. First, the inverse Radon transform is induced for a family of differential expression of projection function. Second, the diffusion partial differential equation (PDE) is generalized from image space to projection space in parallel-beam geometry. Third, the diffusion PDE is further induced from parallel-beam geometry to fan-beam geometry. Finally, the projection direction dependent diffusion is developed to reduce CT noise, which arises from the quantum variation in the low dose exposure of a medical x-ray CT (XCT) system. The proposed noise reduction processes projections iteratively and dependently on x-ray path position, followed by a general CT reconstruction. Numerical simulation studies have demonstrated its feasibility in the noise reduction of low dose fan-beam XCT imaging.",
author = "Shaojie Tang and Xuanqin Mou and Yanbo Zhang and Hengyong Yu",
year = "2011",
doi = "10.1117/12.877635",
language = "英语",
isbn = "9780819485038",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
booktitle = "Medical Imaging 2011",
note = "Medical Imaging 2011: Physics of Medical Imaging ; Conference date: 13-02-2011 Through 17-02-2011",
}