Method and apparatus for image reconstruction for a synthetic aperture gamma ray imager
US8080800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2008 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Feb 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging system includes a platform having mounted thereon an imaging device. The imaging device includes a first detector and a second detector. The imaging system includes a mask having a first pattern of apertures therein, the mask positioned on a first side of the first detector, an anti-mask having a second pattern of apertures therein, wherein the second pattern is derived from the first pattern, the anti-mask positioned on a first side of the second detector, and a computer configured to acquire a plurality of mask datasets and anti-mask datasets of a gamma source, add one of the mask datasets and subtract its respective anti-mask dataset to create a far-field dataset, adjust the far-field image dataset, reconstruct a near-field image of the source using the far-field dataset, and apply an expectation maximization (EM) algorithm to one of the far-field image dataset and the near-field image to enhance contrast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.