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help > RE: output of Export Mask
Aug 10, 2015 06:08 PM | Alfonso Nieto-Castanon - Boston University
RE: output of Export Mask
Hi Kajsa,
Whe using 'export mask' command, the values in the 'filename.mask.img' file contain the T/F statistic values for suprathreshold voxels (and 0 for non-suprathreshold voxels), and the values in the 'filename.ROIs.img' file contains the index of each cluster for suprathreshold voxels (and 0 for non-suprathreshold voxels).
If you would like to create a volume that contains instead the effect-size values (instead of the stat values) within your suprathreshold clusters you could compute that from these files using, for example, the following matlab command:
spm_imcalc({'filename.ROIs.img', 'con_0001.img'}, 'filename.maskBeta.img','(i1>0).*i2');
Let me know if you would like me to further clarify
Best
Alfonso
Originally posted by KM Igelstrom:
Whe using 'export mask' command, the values in the 'filename.mask.img' file contain the T/F statistic values for suprathreshold voxels (and 0 for non-suprathreshold voxels), and the values in the 'filename.ROIs.img' file contains the index of each cluster for suprathreshold voxels (and 0 for non-suprathreshold voxels).
If you would like to create a volume that contains instead the effect-size values (instead of the stat values) within your suprathreshold clusters you could compute that from these files using, for example, the following matlab command:
spm_imcalc({'filename.ROIs.img', 'con_0001.img'}, 'filename.maskBeta.img','(i1>0).*i2');
Let me know if you would like me to further clarify
Best
Alfonso
Originally posted by KM Igelstrom:
Hi,
The Export Mask command in the Results Explorer for second level analysis outputs a thresholded file in addition to the ROI and mask files. I first thought is was a thresholded beta map but the scale of values is completely different (up to 7 or so, vs <<1 in the beta map). Could you explain what that file is?
Many thanks,
Kajsa
The Export Mask command in the Results Explorer for second level analysis outputs a thresholded file in addition to the ROI and mask files. I first thought is was a thresholded beta map but the scale of values is completely different (up to 7 or so, vs <<1 in the beta map). Could you explain what that file is?
Many thanks,
Kajsa
Threaded View
| Title | Author | Date |
|---|---|---|
| KM Igelstrom | Aug 10, 2015 | |
| Alfonso Nieto-Castanon | Aug 10, 2015 | |