EFFICIENT POINT SPREAD FUNCTION MODEL FOR MULTI-CHANNEL COLLIMATOR IN PHOTON IMAGING INCLUDING EXTRA-GEOMETRIC PHOTONS

The point spread function of a multi-channel collimator is modeled in photon imaging. The geometric aperture used in the point spread function is expanded to account for penetration, scattering, and/or imperfections of the collimator. The aperture is broadened using a weight that is a function of th...

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Bibliographic Details
Main Authors SANDERS, III JAMES C, VIJA ALEXANDER HANS
Format Patent
LanguageEnglish
Published 14.11.2013
Subjects
CALCULATING
COMPUTING
COUNTING
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
MEASUREMENT OF NUCLEAR OR X-RADIATION
MEASURING
PHYSICS
TESTING
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Summary:The point spread function of a multi-channel collimator is modeled in photon imaging. The geometric aperture used in the point spread function is expanded to account for penetration, scattering, and/or imperfections of the collimator. The aperture is broadened using a weight that is a function of the distance of the source from the collimator. Rather than scaling the point spread function itself, the geometric aperture used in the point spread function is scaled to an effective aperture. The distance and geometric constraints may be used to determine the geometric aperture, but an additional broadening occurs as a function of the distance to account for non-ideal photon paths of travel. This additional broadening may improve the fidelity with respect to measured data relative to purely geometric or Gaussian models.
Bibliography:Application Number: US201313888734