Applying a priori segmentation masks in GLM

Greetings,

I am trying to use DPARSFA to regress out nuisance variables(WM,CSF,global mean, and 24 Friston motion parameters), detrend, and apply a bandpass filter to data that has already been preprocessed in another software package. The steps that have already been carried out include:

  • field map correction
  • slice time correction
  • realignment
  • coregistration
  • segmentation
  • normalization to MNI template

Is it possible to use the WM, CSF, and brain masks that were already generated as part of the segmentation process in the other software? I would greatly like to avoid redoing segmentation via DARTEL in DPARSFA, given that it has already been done and I have the masks. I see the option for using a "user defined mask" and have selected the brain mask. Please let me know if DPARSFA is the right software to tackle the problem I am trying to address. I would be happy to supply any additional information that would be helpful, below is a screenshot of my current settings for a test subject.

Thank you,

C:\...\Working_Dir\FunImgARW\Subject001\sub1_rfmri.nii

 

 

 

Forums:

Hi,

You can.

You need to put the WM and CSF files into

{WorkDir}/T1ImgNewSegment/Sub001/wc2xxx.nii

{WorkDir}/T1ImgNewSegment/Sub001/wc3xxx.nii

...

{WorkDir}/T1ImgNewSegment/Sub005/wc2xxx.nii

{WorkDir}/T1ImgNewSegment/Sub005/wc3xxx.nii

...

 

You also have to check the other "Nuisance Covariates Regression" check box on the left of "ALFF+fALFF". And setup Segmentation mask and thresholds.

Then it should work. 

Best,

Chao-Gan