Method to correct imaging errors of an x-ray image intensifier system and associated x-ray image intensifier system
US8162543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Feb 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image intensifier system has an image converter tube to convert incident x-ray radiation into visible light and a digital camera system optically downstream of the image converter tube. The camera system has an image sensor to convert the incident, visible light into digital images, and an electronic image processing unit is provided for post-processing of the digital images. In such a system and a method for correcting image distortion errors that occur therein, characteristic data of a magnetic field present in the image converter tube are determined with the aid of a magnetic field probe arranged within the image converter tube or in its environment, an imaging error resulting from the presence of the magnetic field is quantitatively defined using the determined characteristic data, one or more parameters of a correction map leading to the correction of the imaging error are determined based on this, and the correction map that is established in this way is applied to the digital images in the electronic image processing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.