Wavelet based de-noising methods for local SPECT reconstruction with nonuniform attenuation

Li Wang; Junhai Wen; Jing Yang; Yunbin Chen; Zhengrong Liang

doi:10.1117/12.811718

14 March 2009 Wavelet based de-noising methods for local SPECT reconstruction with nonuniform attenuation

Li Wang, Junhai Wen, Jing Yang, Yunbin Chen, Zhengrong Liang

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 72582O (2009) https://doi.org/10.1117/12.811718
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

In the conventional single photon emission computed tomography (SPECT), reconstruction algorithm requires full projection data to reconstruct the images, which will be time-consuming. While in clinic, doctors usually just care about the region of interest (ROI), such as heart, not whole body, in this case, a local SPECT reconstruction algorithm is needed to reconstruct the ROI by only using the projection data from the ROI. In SPECT, the non-stationary Possion noise in the projection data (sinogram) is a major cause to compromise the quality of the reconstructed images. To improve the reconstruction quality, we must remove the Possion noise in the sinogram before reconstruction. However, the conventional space or frequency domain de-noising methods possibly remove the edge information, which is very important for the accurate reconstruction, especially for the local SPECT reconstruction with non-uniform attenuation. Wavelet transform, due to its excellent localization property, has rapidly become an indispensable image processing tool for de-noising. In this paper, we tried to find out the properties of wavelet based de-noising methods for local SPECT reconstruction with non-uniform attenuation. From the de-noising results, we can see that wavelet based de-noising methods have good performance for local SPECT reconstruction.

Citation Download Citation

Li Wang, Junhai Wen, Jing Yang, Yunbin Chen, and Zhengrong Liang "Wavelet based de-noising methods for local SPECT reconstruction with nonuniform attenuation", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72582O (14 March 2009); https://doi.org/10.1117/12.811718

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