Method, device and magnetic resonance tomography system for monitoring emitted RF energy

US7342398B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wolfgang Bielmeier · Erlangen, DE
• Klaus Ludwig · Erlangen, DE

Key dates

• Filing date: Aug 4, 2005
• Grant date: Mar 11, 2008
• Expiry date: Aug 4, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3607
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method, device and magnetic resonance tomography system for monitoring a radio-frequency apparatus in which radio-frequency pulses are emitted at temporal intervals and in which measurement values representing the power of the radio-frequency pulses are measured at temporal intervals, the measurement values are used to determine exposure values that represent a physiological effect that the radio-frequency pulses have on a subject exposed to the radio-frequency pulses. Based on a number of exposure values, exposure-monitoring values are respectively formed and the radio-frequency apparatus is limited in function if an exposure-monitoring value reaches or exceeds an exposure limit value.