Distortion-free magnetic resonance imaging near metallic implants

US7928729B2 · kind B2 · utility

Assignee

• The Board of Trustees of the Leland Stanford Junior University · US

Inventors

• Brian A. Hargreaves · Menlo Park, US
• Wenmiao Lu · Palo Alto, US
• John M. Pauly · Stanford, US
• Garry E. Gold · Stanford, US
• Kim Butts Pauly · Stanford, US

Key dates

• Filing date: Aug 7, 2008
• Grant date: Apr 19, 2011
• Expiry date: May 14, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56536
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for 3D magnetic resonance imaging (MRI) with slice-direction distortion correction is provided. One or more selective cross-sections with a thickness along a first axis is excited using a RF pulse with a bandwidth, wherein a selective cross-section is either a selective slice or selective slab. A refocusing pulse is applied to form a spin echo. One or more 2D encoded image signals are acquired with readout along a second axis and phase encoding along a third axis. Slice-direction distortion is corrected by resolving the position by resolving the frequency offset.