Apparatus for the production of radio frequency B1 fields for NMR using current sheet antennas

US7049818B2 · kind B2 · utility

Assignees

• Physikalisch-Technische Bundesanstalt Braunschweig und Berlin · DE
• BRUKER BIOSPIN MRI GMBH · DE

Inventors

• Herbert Rinneberg · Berlin, DE
• Frank Seifert · Schwanau, DE
• Sven Junge · Hamburg, DE

Key dates

• Filing date: Jul 12, 2004
• Grant date: May 23, 2006
• Expiry date: Jul 12, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/341
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention concerns an apparatus for generating and/or detecting radio frequency (RF)-B1 fields in an investigational volume (10) of a magnetic resonance (MR) device, wherein the apparatus comprises a tubular surface coil (1; 20; 30; 41–44; 51–54; 61) which is formed from a conducting strip and is capacitively closed at least two neighboring ends, wherein the ratio between length L and width W of the strip is ≦30, and wherein the volume under investigation (10) is disposed outside of the space surrounded by the strip, bordering an outer surface (9) of the surface coil (1; 20; 30; 41–44; 51–54; 61) such that the B1 field lines, generated by the surface coil (1; 20; 30; 41–44; 51–54; 61) in the volume under investigation (10) extend substantially parallel to this outer surface (9) thereby producing an NMR transmitting and receiving apparatus with improved properties, in particular, one permitting precise influence of the distribution of the RF-B1 field.