Status: In production
Software tool (executable plus code) and recommendations for acquisition protocols to correct distortions in diffusion MR images generated by main magnetic field inhomogeneities and eddy currents.
The application of strong field gradients required for diffusion tensor imaging (DTI) result in eddy currents that induce significant direction-dependent distortions in the resulting images. The Morphometry BIRN is making available a method developed at the Duke site has completed the validation of a method that significantly reduces these distortions in DTI data collected with a standard single-channel coil. This work has been published”
Chen B, Guo H, Song AW. Correction for direction-dependent distortions in diffusion tensor imaging using matched magnetic field maps. Neuroimage. 30(1):121-129, 2006).
The pulse sequence needed to acquire the data used for the distortion correction is currently implemented on Siemens Trio and GE Horizon platforms and is available through research agreements with the vendors. The GE implementation of the pulse sequence can be distributed to sites that have a research agreement with GE. For the Siemens platform, the pulse sequence will be distributed from their experimental pulse sequence repository using the standard Siemens C2P scheme. Paperwork for the C2P is in progress. Installation and usage literature will be developed and distributed as per usual for Siemens requirements.
To use this tool (including the executable and source code): http://www.nitrc.org/projects/dtic/
