Measurement magnet arrangement

US11204404B2 · kind B2 · utility

Assignee

• The University Of Queensland · AU

Inventors

• Michael Werner Vogel · Redcliffe, AU
• David Charles Reutens · Brisbane, AU
• Andrea Giorni · Bamaga, AU
• Ruben Pellicer-Guridi · Brisbane, AU
• Viktor Vegh · Brisbane, AU

Key dates

• Filing date: Apr 13, 2017
• Grant date: Dec 21, 2021
• Expiry date: Apr 13, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/48
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pre-polarisation magnet arrangement for generating a pre-polarisation field for use in a low field magnetic resonance imaging process, the pre-polarisation magnet arrangement including a pre-polarisation field array including a plurality of permanent pre-polarisation magnets mounted in a support and provided in a circumferentially spaced arrangement surrounding a field of view, a number of the pre-polarisation magnets being movable between respective first and second positions, wherein in the first position the pre-polarisation magnets are configured as a cylindrical Halbach array to generate a pre-polarisation field in the field of view and in the second position the pre-polarisation magnets are configured to minimize the pre-polarisation field in the field of view.