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COPE Plugin for EPI Distortion Correction

Note Spring 2018: there is a bug that gives NaN-values for the SSD and NCC for some type of data. We have found a solution and are working on an updated version of COPE.

Cope user interface screenshot

EPI images suffer from geometric distortions due to non-zero off-resonance fields. The Cope plugin estimates and corrects these deformations using a pair of EPI images acquired with opposite phase-encoding directions (either anterior-posterior and posterior-anterior, or left-right and right-left).

If you don't have the current version of Cope installed, download the ZIP file for your operating system below, unpack it, and place the files in your BrainVoyager plugins folder. You can then start Cope from BrainVoyager's Plugins menu and access the manual by going to Plugins > Description Of Plugins and scrolling down to the section for Cope.

The manual can also be found online here


COPE 1.0

Windows 64-bit for BrainVoyager 20.x, Windows 64-bit for BrainVoyager QX

Mac OS X for BrainVoyager 20.x (incl. help)

Cope 0.5 (2015-03-05)

Version 0.5 has no computational changes but:

  • Important fix for users of Windows 7 or earlier: plugin will now show up in the plugins menu!
  • Help is displayed in the GUI so it is more accessible to users
  • Some more information in the help

Download links:

displacement files in COPE

Figure: diagram that shows which voxel displacement map (VDM) is to be used for correction of each EPI file