Method and circuit arrangement for determining the radiation intensity using directly counting detector

US7943907B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Bjorn-Oliver Eversmann · Munich, DE
• Björn Heismann · Erlangen, DE
• Debora Henseler · Erlangen, DE
• Silke Janssen · Heroldsbach, DE
• Daniel Niederlöhner · Erlangen, DE

Key dates

• Filing date: Jan 21, 2009
• Grant date: May 17, 2011
• Expiry date: Mar 17, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01T1/17
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A method and a circuit arrangement are disclosed for determining radiation intensity using counting detectors or detector elements, in which x-ray radiation photons, which are either absorbed or absorbed in part, generate electrical signals, the pulse number and pulse height of which is correlated to an incident radiation intensity, and the radiation intensity is at least determined by counting the pulses. According to at least one embodiment of the invention, the signal pulses incident on at least one detector or detector element are detected simultaneously by at least one continuously operating pulse height discriminator and by at least one pulse height discriminator operating in a clocked fashion, with the number of incident signal pulses being determined with the aid of these two items of detection information.