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Efficient point spread function model for multi-channel collimator in photon imaging including extra-geometric photons
US8958622B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8958622-B2 |
| Application number | US-201313888734-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 7, 2013 |
| Priority date | May 9, 2012 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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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.
First claim
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We claim: 1. In a non-transitory computer readable storage medium having stored therein data representing instructions executable by a programmed processor for point spread function modeling of a multi-channel collimator in photon imaging, the storage medium comprising instructions for: determining a geometric aperture as a function of an entrance hole or an exit hole of the multi-channel collimator scaled based on geometric constants; broadening the geometric aperture with a fa…
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Physics · mapped topic
- G06T12/10Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G06T11/005Primary
Physics · mapped topic
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- What does patent US8958622B2 cover?
- 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 itsel…
- Who is the assignee on this patent?
- Vija Alexander Hans, Sanders Iii James C, Siemens Medical Solutions
- What technology area does this patent fall under?
- Primary CPC classification G06T12/10. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).