Method for motion correction of emission computed tomography data by way of magnetic resonance tomography data

US9808203B2 · kind B2 · utility

Assignees

• Siemens Aktiengesellschaft · DE
• WESTFÄLISCHE WILHELMS-UNIVERSITÄT MÜNSTER · DE

Inventors

• Carmel Hayes · Birkenfeld, DE
• Ralf Ladebeck · Erlangen, DE
• Klaus Schäfers · Telgte, DE

Key dates

• Filing date: May 20, 2014
• Grant date: Nov 7, 2017
• Expiry date: Apr 5, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H30/40
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method includes introducing the examination object into an examination region of a combination device; recording emission computed tomography data over a measurement period and storing detection events and detection instants associated therewith; measuring magnetic resonance data of at least two subregions of the examination region at at least two instants during the recording period of the emission computed tomography data and storing the magnetic resonance data and the recording instants; determining motion information describing a motion of a region of the examination object at a first instant relative to the position at a second instant from the magnetic resonance data recorded at the first instant and the second instant, for each subregion; determining a motion model describing motion of the examination object, for the entire object, from information for the subregions; and calculating motion-corrected emission tomography data from detection events, detection instants and the motion model.