B0 field drift correction in a temperature map generated by magnetic resonance tomography

US7772846B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Joerg Roland · Hemhofen, DE

Key dates

• Filing date: Oct 10, 2008
• Grant date: Aug 10, 2010
• Expiry date: Feb 13, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4814
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method to correct a B0 field drift in a temperature map exposure obtained by magnetic resonance tomography as well as a device to implement such a method, a magnetic resonance phantom is placed at a stored, marked reference position relative to an acquisition coil. A first reference phase image of the phantom is automatically acquired in the acquisition of a first phase image of an examination subject in the unheated state. A second reference phase image of the phantom is automatically acquired in the acquisition of a later second phase image of the examination subject. The phase images are adapted to one another according to the requirements of a calibration of the associated reference phase images.