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