Method for forming a gamma image with sub-pixel resolution, taking into account a spatial non-uniformity in sensitivity
US12085683B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 2022 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Jul 14, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2928
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for determining a spatial-sensitivity function of a gamma camera, the gamma camera observing a field of observation (Ω) liable to contain radiation sources, the gamma camera including a detector material; pixels, distributed over a detecting area, each pixel being configured to form a detection signal under the effect of detection of an interaction of an ionising photon in the detector material; a unit for achieving sub-pixel resolution, the unit being programmed to assign a position (x,y) to each detected interaction on the basis of detection signals formed by a plurality of pixels, the position being determined on a mesh dividing each pixel into a plurality of virtual pixels. The method includes steps allowing weights assigned to each virtual pixel to be determined, each weight corresponding to a sensitivity of each virtual pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.