Title :
Image reconstruction using the wavelet transform for positron emission tomography
Author :
Choi, Yong ; Koo, Ja-Yong ; Lee, Nam-Yong
Author_Institution :
Dept. of Nucl. Med., Sungkyunkwan Univ. Sch. of Med., Seoul, South Korea
Abstract :
The authors conducted positron emission tomography (PET) image reconstruction experiments using the wavelet transform. The Wavelet-Vaguelette decomposition was used as a framework from which expressions for the necessary wavelet coefficients might be derived, and then the wavelet shrinkage was applied to the wavelet coefficients for the reconstruction (WVS). The performances of WVS were evaluated and compared with those of the filtered back-projection (FBP) using software phantoms, physical phantoms, and human PET studies. The results demonstrated that WVS gave stable reconstruction over the range of shrinkage parameters and provided better noise and spatial resolution characteristics than FBP.
Keywords :
image reconstruction; image resolution; medical image processing; positron emission tomography; wavelet transforms; PET image reconstruction; Wavelet-Vaguelette decomposition; filtered back-projection; medical diagnostic imaging; noise characteristics; nuclear medicine; physical phantoms; shrinkage parameters; software phantoms; spatial resolution characteristics; wavelet coefficients expressions derivations; Humans; Image reconstruction; Imaging phantoms; Noise reduction; Nuclear medicine; Performance evaluation; Positron emission tomography; Software performance; Wavelet coefficients; Wavelet transforms; Algorithms; Animals; Brain; Fourier Analysis; Haplorhini; Heart; Humans; Image Processing, Computer-Assisted; Models, Theoretical; Phantoms, Imaging; Tomography, Emission-Computed;
Journal_Title :
Medical Imaging, IEEE Transactions on
