Bruit multiplex en gammagraphie par codage
Autor: | J. Fonroget, J. Brunol |
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Rok vydání: | 1977 |
Předmět: |
Physics
Fresnel zone business.industry Shot noise Wiener deconvolution Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Optics Gaussian noise Image noise Annulus (firestop) symbols Coded aperture Deconvolution Electrical and Electronic Engineering Physical and Theoretical Chemistry business |
Zdroj: | Optics Communications. 22:301-306 |
ISSN: | 0030-4018 |
DOI: | 10.1016/s0030-4018(97)90015-8 |
Popis: | In coded aperture imaging applied to nuclear medicine, the ultimate limit is the Poisson noise of the gamma ray source. We show that the noise depends on the type of code. In particular we compare the signal to noise ratio between images obtained either by a Fresnel zone or by an annulus at equal resolution. This comparative study allows to choose the best code and, for a Wiener type deconvolution filter, to specify the optimum noise parameter. A deconvolution example is given. |
Databáze: | OpenAIRE |
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