Title :
Simultaneous attenuation and scatter correction by restoration in PET imaging
Author :
Bentourkia, Mhamed ; Sarrhini, Otman
Author_Institution :
Dept. of Nucl. Med. & Radiobiol., Sherbrooke Univ., Que., Canada
Abstract :
The aim in this work is to correct for attenuation and scatter in PET by analytically assessing the distribution of the scattered photons using the emission and the transmission images, the probability of scatter interactions and the detection efficiency. At an energy threshold above 300 keV, the attenuated photons are exactly those have been scattered. These are removed from the coincidence detection and restored to the coincidences corresponding to the scattering angle θ=0. We applied this new method for data obtained with a small animal PET scanner but the method is equivalent for a whole body scanner.
Keywords :
coincidence techniques; image reconstruction; image restoration; image scanners; medical image processing; positron emission tomography; probability; 300 keV; PET imaging; attenuated photons; coincidence detection; detection efficiency; emission image; image restoration; scatter correction; scatter interaction probability; scattered photon distribution; simultaneous attenuation; small animal PET scanner; transmission images; whole body scanner; Animals; Attenuation; Detectors; Electromagnetic scattering; Image analysis; Image reconstruction; Image restoration; Particle scattering; Positron emission tomography; Whole-body PET;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1466687
