Analytical derivation and experimental verification of a sensitivity formula for slit-slat SPECT collimation

Author

Accorsi, Roberto ; Metzler, Scott D. ; Novak, John R. ; Ayan, Ahmet S. ; Jaszczak, Ronald J.

Author_Institution

Dept. of Radiol., Children´´s Hosp. of Philadelphia, PA

Volume

5

fYear

2006

fDate

Oct. 29 2006-Nov. 1 2006

Firstpage

2976

Lastpage

2980

Abstract

The formula g = wd²/[4pia(d+t)h] sin²thetas is derived for the sensitivity of a slit-slat collimator. Both Monte Carlo and experimental data confirm the expected dependence of g on the parameters, especially the distance from the plane of the slit h and the off-axis angle thetas. To refine agreement, a formula for the sensitivity-equivalent slit width is derived to account for slit penetration. At least at low energy its predictions agree well with Monte Carlo data and its use improves agreement with experimental data.

Keywords

Monte Carlo methods; medical computing; medical image processing; single photon emission computed tomography; Monte Carlo method; sensitivity equivalent slit width; sensitivity formula; slit penetration; slit-slat SPECT collimation; slit-slat collimator; Apertures; Biomedical engineering; Biomedical imaging; Collimators; Detectors; Monte Carlo methods; Nuclear and plasma sciences; Nuclear imaging; Radiology; Single photon emission computed tomography; Collimation; nuclear imaging; pinhole; single photon emission computed tomography (SPECT); slat; slit;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2006. IEEE

Conference_Location

San Diego, CA

ISSN

1095-7863

Print_ISBN

1-4244-0560-2

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2006.356500

Filename

4179657