Method and magnetic resonance system for adjustment of the field strength of RF pulses

US7573266B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Thorsten Feiweier · Peising, DE
• Peter Heubes · Baiersdorf, DE
• Thorsten Speckner · Erlangen, DE

Key dates

• Filing date: Dec 19, 2006
• Grant date: Aug 11, 2009
• Expiry date: Jun 6, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/586
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method for adjustment of the field strength of radio-frequency pulses as well as a magnetic resonance measurement system, radio-frequency pulses are emitted by a radio-frequency antenna of a magnetic resonance measurement system in a magnetic resonance measurement. A test volume slice is initially excited by emission of radio-frequency pulses with a defined pulse amplitude by the appertaining radio-frequency antenna and one-dimensional, spatially-resolved characteristic values are determined along an extent direction of the test volume slice. The one-dimensional, spatially-resolved characteristic values respectively represent a local field strength of the B1 field in strips of the test volume slice running perpendicular to the extent direction. An average value of the determined characteristic values is then formed over at least over one determined segment along the extent direction of the test volume slice. A pulse amplitude of the radio-frequency pulses that is to be set for the magnetic resonance measurement to be implemented is determined on the basis of the average value.