How do I get a fieldmap sequence for my scanner?
We cannot provide field-map sequences for different scanners. The recommended sequence is a symmetric-asymetric spin-echo sequence as described above. If such a sequence is not available at your site, try contacting the FSL email list to see if others have a sequence for your scanner that could be used. FAST • How can I get the total volume of CSF/White-Matter/Grey-Matter from FAST? The best estimate of volume for any of the segmented matter types is obtained by summing up the partial volume estimates (PVE) which should be saved as separate outputs using the -e and -ov options. To obtain the sum, the easiest way is to use fslstats to get the mean value and the total volume – the product of these values is then equal to the desired volume. For example, if mybrain_pve_0 is the output corresponding to the CSF segmentation, then the fslstats calls are: fslstats mybrain_pve_0 -m fslstats mybrain_pve_0 -v The resulting mean value from the first call should then be multiplied by the first out
