Shielding an imaging array from X-ray noise
US7501631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Nov 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/1898
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic imaging sensor, which has an improved immunity to noise caused by unwanted x-rays, images an object by collecting charge carriers produced in the sensor when the object is exposed to x-rays. One or more shielding areas are formed proximate the sensor to capture or sweep away any undesirable charge carriers generated by the unwanted x-rays. The shielding areas extend deeper beneath the surface of the sensor than the depth at which the desired charge carriers corresponding to the object being imaged is collected. The shielding areas capture charge carriers formed by the unwanted x-rays, which penetrate into the sensor to a greater depth than the depth at which the. desired charge carriers are collected. In this way, the undesirable charge carriers are captured near the region where they are generated and before they migrate towards the surface where they can be collected and manifest as noise in the resulting image of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.