Split gradient coil and hybrid systems using same

US9423479B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Johan Overweg · Eindhoven, NL
• Volkmar Schulz · Schwarzenbruck, DE
• Torsten Solf · Aachen, DE
• Gordon D. DeMeester · Wickliffe, US
• Michael A. Morich · Mentor, US

Key dates

• Filing date: Nov 8, 2013
• Grant date: Aug 23, 2016
• Expiry date: Dec 21, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/421
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.