Wide dynamic range digital imaging system and method
US6791091B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 19, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jun 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/803
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A digital x-ray imaging device and method. The imaging device comprises a top electrode layer; a dielectric layer; a sensor layer comprising a photoconductive layer and a plurality of pixels, each pixel comprising a charge-collecting electrode; a thin film transistor (TFT) readout matrix connected to the charge-collecting electrodes; and a variable power supply adapted to provide a range of voltages between the top electrode layer and the TFT readout matrix. The variable power supply may comprise a programmable power supply. The method comprises varying the voltage between the top electrode layer and the TFT readout matrix of a TFT-based direct digital x-ray imaging device to provide an acceptable signal-to-noise ratio over a greater range of exposures than provided at a single voltage. The method may be particularly useful in non-destructive testing applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.