Experimental study of stochastic noise propagation in SPECT images reconstructed using the conjugate gradient algorithm.
Thanks to an experimental study based on simulated and physical phantoms, the propagation of the stochastic noise in slices reconstructed using the conjugate gradient algorithm has been analysed versus iterations. After a first increase corresponding to the reconstruction of the signal, the noise stabilises before increasing linearly with iterations. The level of the plateau as well as the slope of the subsequent linear increase depends on the noise in the projection data.
Mariano-Goulart
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D
Department of Nuclear Medicine, Lapeyronie University Hospital, 371 Avenue du Doyen G. Giraud, 34295 Montpellier Cedex 5, France. d-mariano_goulart@chu-montpellier.fr
Fourcade
M
M
Bernon
J L
JL
Rossi
M
M
Zanca
M
M
D000465:Algorithms; D003198:Computer Simulation; D006801:Humans; D007091:Image Processing, Computer-Assisted; D019047:Phantoms, Imaging; D016012:Poisson Distribution; D013269:Stochastic Processes; D015899:Tomography, Emission-Computed, Single-Photon