Energy selective X-ray system with low noise
US8929508B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Apr 17, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Mar 31, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/423
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus or method for providing information about an object from x-ray radiation transmitted through the object. An embodiment comprises an x-ray source (10) positioned on one side of an object (50) an x-ray detector (102) positioned on the opposite side, and means for computing two or more information signals, which are substantially the line integrals of the basis set coefficients of the x-ray attenuation coefficient from the x-ray photons transmitted through said object at three or more regions of the x-ray energy spectrum. In one embodiment the means for computing the two or more information signals comprises a linear maximum likelihood estimator (122), a correction processor (142) to compute a correction to the linear maximum likelihood estimate (132), and an adder (152) to add the estimate and the correction to produce the two or more information signals (154).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.