Polarization correction for direct conversion x-ray detectors

US10725188B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Roger Steadman Booker · Aachen, DE
• Ewald Roessl · Ellerau, DE
• Heiner Daerr · Hamburg, DE

Key dates

• Filing date: Oct 11, 2016
• Grant date: Jul 28, 2020
• Expiry date: Feb 11, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/585
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Photon-counting x-ray detectors (3) suffer from a degradation of their performance due to polarization. In order to correct the effects of polarization to the generated x-ray images, the invention suggests (i) exposing the radiation detector (3) to a first radiation pulse emitted by a further radiation source (11) and obtaining a first electric pulse signal generated by the radiation detector (3) in response thereto, (ii) later exposing the 5 radiation detector (3) to a second radiation pulse emitted by the further radiation source (11) during the acquisition of the image and obtaining a second electric pulse signal generated by the radiation detector (3) in response thereto, and (iii) comparing amplitudes of the first and second electric pulse signals and generating the x-ray image based on a result of the comparison. The invention provides a corresponding x-ray device and a corresponding method.