Module Detail Information

Name:3D FWHMx
Type: Module
Short URL:
http://bit.ly/1BuiKtQ
Description:Unlike the older 3dFWHM, this program computes FWHMs for all sub-bricks in the input dataset, each one separately. The output for each one is written to the file specified by '-out'. The mean (arithmetic or geometric) of all the FWHMs along each axis is written to stdout. (A non-positive output value indicates something happened; e.g., FWHM in z is meaningless for a 2D dataset.) INPUT FILE RECOMMENDATIONS: For FMRI statistical purposes, you DO NOT want the FWHM to reflect the spatial structure of the underlying anatomy. Rather, you want the FWHM to reflect the spatial structure of the noise. This means that the input dataset should not have anatomical structure. One good form of input is the output of '3dDeconvolve -errts', which is the residuals left over after the GLM fitted signal model is subtracted out from each voxel's time series. If you don't want to go to that trouble, use '-unif' to at least partially subtract out the anatomical spatial structure, or use the output of 3dDetrend for the same purpose.
Executable:
/3dFWHMx
Input Parameters:
 - Input Dataset
 - Mask
 - Automask
 - Input DDD
 - Dset DDD
 - Demed
 - Unif
 - Detrend
 - Det Prefix
 - Geom
 - Arith
 - Compat
 - Redirect
Output Parameters:
 - Output
File size:42.31 KB
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