Hi, Xue and other SnPM users,
I would like to answer the questions as follows,
>Dear SPM developers and users:
>I have a few questions regarding the results
>generated by SnPM under
>ˇ°multisubject: 1 condition, 1scan per subjectˇ±. I
>am looking at either T
>test or pseudo T test with in plane variance
>smoothing. After running the
>program, there are several files generated:
>SPMt.img: I assume this is the T/pseudo-T map. What
>is the format of the
>data in the file, int16, uint16, double?? I want to
>know this so that I
>could read the file into the matlab and display the
>image in different
>ways. And dose the SPMt.img have the same spatial
>dimension as the
>original image you feed into the program? Is there
>any resampling has
>been done during the SnPM calculation?
Yes, this is the T/pseudo-T map. The format is float.
Actually you can use the 'Display' or 'CheckReg'
buttons in SPM to see the T image. The SPMt.img does
have the same spatial dimension as the original
images.
>SnPMp_SSuc.img and SnPMp_SSc.img: What are those
>files and how to
>interpret them?
SnPMp_SSuc.img is the image of nonparametric
uncorrected P values of all the voxels (i.e. not
controlling for family-wise error). SnPMp_SSc.img is
the image of nonparametric corrected P values of all
the voxels (i.e. controlling for family-wise
error, that is to say, using the Max T distribution).
>There are also several matlab data files generated,
>e.g. BETA. Do those
>files just contain intermediate results but they are
>not needed to
>interpret the final results?
Right, you don't need to interpret these images.
>Thanks a lot!
>Xue
Thank you for using SnPM!
Best wishes,
Jun
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Jun Ding, Ph.D. student
Department of Biostatistics
University of Michigan
Ann Arbor, MI, 48105
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