Title :
Linear closed-form methods for ideal-sinogram estimation in 2D SPECT
Author :
Pan, X. ; Metz, C.E.
Author_Institution :
Dept. of Radiol., Chicago Univ., IL, USA
Abstract :
We derived explicit relationships between the ideal sinogram and the sinogram degraded by both attenuation and distance-dependent spatial resolution in 2D SPECT that is described by either a Cauchy or a Gaussian function. Attempts to reduce the statistical variance in the reconstructed image lead to the development of infinite classes of closed-form methods for estimation of the ideal sinogram. These methods were applied in both computer-simulation and real-data studies
Keywords :
Fourier transforms; Gaussian distribution; image reconstruction; image resolution; medical image processing; single photon emission computed tomography; 2D SPECT; Cauchy function; Gaussian function; attenuation; closed-form methods; computer-simulation; distance-dependent spatial resolution; ideal-sinogram estimation; infinite classes; linear closed-form methods; real-data studies; reconstructed image; statistical variance; Attenuation measurement; Attenuators; Cancer; Computational modeling; Computer simulation; Degradation; Image reconstruction; Image sampling; Radiology; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium, 1996. Conference Record., 1996 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-3534-1
DOI :
10.1109/NSSMIC.1996.587951
