Method for monitoring patient exposure in a magnetic resonance device

US9547053B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wolfgang Bielmeier · Erlangen, DE
• Matthias Gebhardt · Erlangen, DE
• Juergen Nistler · Erlangen, DE
• Dieter Ritter · Bad Mergentheim, DE
• Volker Schnetter · Nuremberg, DE

Key dates

• Filing date: Dec 6, 2012
• Grant date: Jan 17, 2017
• Expiry date: Nov 5, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5612
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for monitoring an exposure experienced by a patient during an examination with a magnetic resonance device having a transmitter device is provided. The method includes determining a coil power loss from measured amplitudes and phases of a first measuring device, and determining an overall transmitted power from voltage measurement values of the second measuring device. The method also includes determining a specific absorption rate (SAR) value describing a power entering a patient from the coil power loss and the overall transmitted power and comparing the SAR value with at least one limit value. A transmission operation of the transmitter device is terminated if the at least one limit value is exceeded.