DocumentCode :
2815538
Title :
Analytic correction for scatter in fully 3D PET: statistical issues
Author :
Ollinger, John M.
Author_Institution :
Washington Univ., St. Louis, MO, USA
Volume :
2
fYear :
1997
fDate :
9-15 Nov 1997
Firstpage :
1386
Abstract :
Scatter correction methods based on the analytical calculation of the scatter distribution can only estimate scatter from regions outside the field-of-view if transmission and emission scans of these regions exist. The duration of such scans must be short if they are to be acquired in a clinical setting. The effect of scan duration on the accuracy of the scatter estimates is investigated here. It is shown that the correction is insensitive to poor counting statistics in the emission scan, but is strongly affected by poor counting statistics in the transmission scan. Applying an adaptive segmentation algorithm to the transmission data greatly improves performance. Satisfactory scatter estimates are possible with transmission scans as short as one minute
Keywords :
adaptive signal processing; gamma-ray scattering; image segmentation; medical image processing; positron emission tomography; statistical analysis; 1 min; adaptive segmentation algorithm; clinical setting; emission scan; field-of-view; fully 3D PET statistical issues; medical diagnostic imaging; nuclear medicine; poor counting statistics; scatter analytic correction; scatter estimates; transmission scans; Attenuation; Image reconstruction; Imaging phantoms; Mathematical model; Positron emission tomography; Protocols; Robustness; Scattering; Statistical distributions; Statistics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Conference_Location :
Albuquerque, NM
ISSN :
1082-3654
Print_ISBN :
0-7803-4258-5
Type :
conf
DOI :
10.1109/NSSMIC.1997.670579
Filename :
670579
Link To Document :
بازگشت