带非均匀衰减的超分辨率 SPECT 重建。

Super resolution SPECT reconstruction with non-uniform attenuation.

机构信息

Beijing Laboratory of Intelligent Information Technology, School of Computer Science & Technology, Beijing Institute of Technology, Beijing 100081, China.

出版信息

Comput Biol Med. 2012 Jun;42(6):651-6. doi: 10.1016/j.compbiomed.2012.02.005. Epub 2012 Mar 20.

DOI:10.1016/j.compbiomed.2012.02.005

PMID:22440892

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.

摘要

在本文中，基于 Novikov 的带限 Radon 变换显式反演公式，我们提出了一种用于补偿非均匀衰减的超高分辨率 SPECT 重建算法。与通过在重建图像中进行超分辨率（SR）来提高医学图像分辨率的先前方法不同，所提出的方法在低分辨率（LR）正弦图中应用 SR 算法，该方法仅需要探测器的一维移动，并且 PSF 易于获得。仿真结果表明，我们的重建算法是有效的。