Method for producing tomographic pictures with the aid of an X-ray computed tomography system with scattered radiation correction

US7636415B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Popescu · Erlangen, DE
• Herbert Bruder · Hemhofen, DE
• Christoph Suess · Erlangen, DE

Key dates

• Filing date: Feb 15, 2008
• Grant date: Dec 22, 2009
• Expiry date: Feb 15, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/5282
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method and an X-ray CT system are disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system.