Title :
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
fDate :
Oct. 29 2006-Nov. 1 2006
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;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2006. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-0560-2
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2006.356500
