Dear SPMers;
I think that it is a beginner question but I need some help.
I am trying use Two Sample T-Test to analyze SPECT images of one patient x controls (10), I was able to Estimate this model but I get a error when I try to define contrasts.
I noticed that voxel intensities between patient SPECT and controls SPECTs are quite different. The SPECT from the patient ranges voxel intensities between ~3500 to ~7000 and SPECTs from controls range from ~350 to ~700. Is that difference interfering in the analysis? How can I solve it?
Thank you very much.
Henrique Amaral
Universityof Sao Paulo
Brazil
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