X-ray CT system having a patient-surrounding, rotatable anode with an oppositely rotatable x-ray focus

US8130897B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Popescu · Erlangen, DE
• Georg Wittmann · Herzogenaurach, DE

Key dates

• Filing date: Jul 24, 2009
• Grant date: Mar 6, 2012
• Expiry date: Sep 24, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J2235/086
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An x-ray computed tomography apparatus has one anode ring in a vacuum housing surrounding an examination volume, wherein a focus of an x-ray source revolves on the anode ring to expose the examination volume with an x-ray beam from different directions, and a detector system arranged on a rotating frame that can rotate around a system axis. The detector system serves to detect the x-ray radiation exiting from the examination volume, wherein the detector system and the focus can rotate around the system axis synchronously and in the same rotation direction with a rotation angle offset by 180°. The apparatus also includes a computer to process the measurement values acquired by the detector system. The anode ring can be driven such that it rotates around the system axis, and the rotation direction of the anode ring and the rotation direction of the focus around the system axis are opposite while a rotation of the focus around the system axis ensues.