Electromagnetic shielding for high field MRI coils

US7633294B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Christoph Leussler · Hamburg, DE
• Kai-Michael Luedeke · Hamburg, DE
• Michael A. Morich · Mentor, US
• Zhiyong Zhai · Mayfield Heights, US
• Gordon D. DeMeester · Wickliffe, US

Key dates

• Filing date: Apr 19, 2006
• Grant date: Dec 15, 2009
• Expiry date: Jun 28, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3628
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A radio frequency coil for magnetic resonance imaging includes an active coil member (70, 701, 170, 270) that defines an imaging volume. The active coil member has a first open end (74) with a first cross-sectional dimension (dactive). A shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272) substantially surrounds the active coil member. The shield coil member has a constricted open end (88) arranged proximate to the first open end of the active coil member with a constricted cross-sectional dimension (dconst) that is less than the cross-sectional dimension (dShieid) of the shield coil member. In some embodiments, the radio frequency coil further includes an outer shield coil member (100) that is substantially larger than the shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272), and surrounds both the active coil member and the shield coil member.