Phase correction for echo-planar imaging

US11169236B2 · kind B2 · utility

Assignee

• The General Hospital Corporation · US

Inventors

• Kun Zhou · Hangzhou City, CN
• Wei Liu · Hunan, CN
• Yulin Chang · Belmont, US
• Uvo Hölscher · Erlangen, DE
• William Scott Hoge · Watertown, US
• Jonathan R. Polimeni · Cambridge, US

Key dates

• Filing date: Sep 16, 2019
• Grant date: Nov 9, 2021
• Expiry date: May 16, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5611
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems and methods include conversion of a first frame of k-space data acquired using a first initial readout polarity to first hybrid (kx, y)-space data, conversion of a second frame of k-space data acquired using a second initial readout polarity to second hybrid (kx, y)-space data, determination of a relationship between phase difference and y-position based on phase differences between a plurality of pixels located at kx=a of first hybrid (kx, y)-space data and a plurality of pixels at kx=b of second hybrid (kx, y)-space data, where a and b are constants, modification of the second hybrid (kx, y)-space data based on the relationship, conversion of the modified second hybrid (kx, y)-space data to a modified second frame of k-space data, generation of two single-polarity readout k-space frames based on the first frame of k-space data and the modified second frame of k-space data, and correction of a third frame of EPI image data based on the two single-readout polarity k-space frames.