Multi-shot echo planar imaging using reordered segments and recursive radio frequency pulse design giving matched slice profiles across segments

US11874353B2 · kind B2 · utility

Assignee

• The General Hospital Corporation · US

Inventors

• Avery J. L. Berman · Brookline, US
• Jonathan R. Polimeni · Cambridge, US
• William A. Grissom · Nashville, US
• Kawin Setsompop · Boston, US
• Thomas Witzel · Boston, US

Key dates

• Filing date: Mar 27, 2020
• Grant date: Jan 16, 2024
• Expiry date: Sep 21, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5616
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Described here are systems and methods for producing images with a magnetic resonance imaging (“MRI”) system using a high-resolution, motion-robust, artifact-free segmented echo planar imaging (“EPI”) technique. In particular, a fast low angle excitation echo planar imaging technique (“FLEET”) using variable flip angle (“VFA”) radio frequency (“RF”) excitation pulses that are recursively designed to have a flat magnitude and phase profile across a slice for a range of different flip angles by accounting for longitudinal magnetization remaining after each preceding RF pulse is applied.