An analysis of correction methods for emission contamination in PET postinjection transmission measurement

Author

Luk, W.K. ; Digby, W.D. ; Jones, W.F. ; Casey, M.E.

Author_Institution

CTI PET Systems, Knixville, TN, USA

Volume

42

Issue

6

fYear

1995

fDate

12/1/1995 12:00:00 AM

Firstpage

2303

Lastpage

2308

Abstract

Three techniques for estimation of emission contamination in PET postinjection transmission scans (PITSs) were evaluated and compared. For PET scanners with electronic windowing of events that intersect the transmission rod source locations, the emission contamination can be estimated by: (1) the emission data taken either before or after the transmission scan, using a sinogram window mask to correct for the rod position and window width; (2) the emission data taken concurrently with the transmission data and a similar sinogram window mask; (3) utilizing a windowed transmission scan with cold rods, or “mock” scan. These techniques have been evaluated with phantom experiments to simulate a wide range of residual activities and object sizes

Keywords

positron emission tomography; PET postinjection transmission; PET scanners; cold rods; correction methods; electronic windowing; emission contamination; phantom experiments; positron emission tomography; postinjection transmission scans; residual activities; sinogram window mask; transmission rod source locations; window width; Attenuation; Contamination; Helium; Imaging phantoms; Oncology; Pollution measurement; Position measurement; Positron emission tomography; Time measurement; Whole-body PET;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.489432

Filename

489432