Method for energy calibrating quantum-counting x-ray detectors in a dual-source computed-tomography scanner

US9039284B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Mario Eichenseer · Pinzberg, DE
• Steffen Kappler · Effeltrich, DE
• Edgar Kraft · Erlangen, DE
• Björn Kreisler · Eschborn, DE
• Daniel Niederlöhner · Erlangen, DE
• Stefan Wirth · Erlangen, DE

Key dates

• Filing date: Mar 12, 2013
• Grant date: May 26, 2015
• Expiry date: Jul 25, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01T1/2985
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A method is disclosed for energy calibrating quantum-counting x-ray detectors in an x-ray installation including at least two x-ray systems turnable around a center of rotation. A target, for producing x-ray fluorescence radiation, is positioned between the first x-ray source and first x-ray detector and irradiated with x-radiation of the first x-ray source in such a way that x-ray fluorescence radiation which strikes the second x-ray detector from the target is produced by the x-radiation of the first x-ray source. The second x-ray detector is then energy calibrated by way of the x-ray fluorescence radiation of the target. The first x-ray detector can be energy calibrated in the same way with the aid of the x-radiation of the second x-ray source. With the proposed method, the x-ray detectors of a dual-source CT x-ray installation can be calibrated with little expenditure under conditions close to those of the system.