Apparatus for three dimensional tomography utilizing an electro-optic x-ray detector
US4833698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1986 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Aug 1, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is an apparatus for producing tomographic images of an object comprising: a beam of collimated radiation transmitted through the object in a plurality of rays, an imaging electro-optic detector for detecting the attenuated transmitted radiation after it has passed through the object, the detector including an energy convertor, image format altering device, and a readout device, wherein the detector has a detective quantum efficiency greater than 0.05, a total signal dependent background less than 10 percent of the signal from the unattenuated x-ray beam, a useful dynamic range greater than 10, a non-uniformity of response between adjacent active pixels of less than 75%, and deviations of geometric linearity that is less than 10 pixels in the recorded image, means for obtaining the attenuation coefficients from the transmitted radiation, and means for computing a reconstructed image of the object from the attenuation coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.