Super resolution SPECT reconstruction with non-uniform attenuation

Authors:
Ziye Yan;Yao Lu;Junhai Wen;Cuifen Li
Affiliations:
Beijing Laboratory of Intelligent Information Technology, School of Computer Science & Technology, Beijing Institute of Technology, Beijing 100081, China and Department of Biomedical Engineering, ...;Beijing Laboratory of Intelligent Information Technology, School of Computer Science & Technology, Beijing Institute of Technology, Beijing 100081, China;Department of Biomedical Engineering, School of Life Science, Beijing Institute of Technology, Beijing 100081, China;Department of Biomedical Engineering, School of Life Science, Beijing Institute of Technology, Beijing 100081, China
Venue:
Computers in Biology and Medicine
Year:
2012

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Abstract

In this paper, based on Novikov's explicit inversion formula for the attenuated Radon transform, we present a super resolution SPECT reconstruction algorithm with compensation for non-uniform attenuation. Unlike the former methods improving the medical image resolution via super resolution (SR) in the reconstructed image, the proposed method apply the SR algorithm in the low resolution (LR) sinogram, which needs only 1-D shift of the detector, and the PSF is easy to obtain. Simulation results show that our reconstruction algorithm is effective.