Hi,
I have been using flirt in a 6DOF-2D mode to perform eddy current corrections,
and this works very well. However, the expected distortions can be modeled
using less degrees of freedom:
- a translation along the phase encoding direction
- a shear parallel to the phase encoding direction
- a scaling in the phase encoding direction
Is it possible to instruct flirt to search only along these variables? Could
one use the schedule files for that? I assume it would save time (currently,
on a 1.6 Ghz pentium, the correction of one volume of 16 128x128 slices,
with 4 acquisitions of 6 directions of diffusioin weighting, takes 1.5
hour...)
Thanks a lot,
Erik-Jan Vlieger
--
E.J.P. Vlieger
Academic Medical Center
Dept of Radiology, G1 - 209
Meibergdreef 9
1105 AZ Amsterdam
The Netherlands
Tel: +31 20 5664975 / 5669111 pager 63539
Fax: +31 20 5669119
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