Systems and methods for resetting photoconductive x-ray imaging detectors
US9348038B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2011 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Aug 26, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/583
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods of resetting a blocking-type photoconductive imaging detector are provided. In one embodiment, after having obtained an image, the imaging detector may be reset by applying a reversed bias potential difference and illuminating the imaging radiation detector with photoexcitation radiation. The photoexcitation radiation has a wavelength selected to excite mobile charges within the photoconductive layer and a spatial intensity profile related to the measured image for neutralizing the trapped charges in a spatially compensated manner. In another embodiment, a photoionizing beam is directed onto an x-ray light valve having a liquid crystal layer in contact with a photoconductive layer. The beam passes through an optically transmissive surface of the x-ray light valve and photoionizes a species within the liquid crystal layer, generating mobile charged entities that at least partially neutralize charges trapped at the interface, improving the performance of the x-ray light valve when performing subsequent x-ray imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.