Patent · US Expired

Method and apparatus for reducing artifacts in echo planar imaging

US6529001B2 · kind B2 · utility

10Cited by
5References
30Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 27, 2001
Grant dateMar 4, 2003
Priority date—
Expiry dateMay 4, 2021

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R33/56554
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A technique is described for correcting phase errors in a bipolar readout gradient MRI imaging sequence, such as an EPI examination. The technique employs alternating sets of oscillating readout gradient pulses. Each readout pulse train has a polarity which is inverted with respect to an immediately preceding and an immediately succeeding readout sequence. The collected data then incorporates both image data and data which is used to correct for phase errors. Following data acquisition, correction factors may be determined from the k-space frames for correction of successive k-space data. K-space frames may be reformatted to inherently correct for phase errors, followed by combination of hybrid k-space data frames to obtain a corrected image.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.