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Hi SPM users: I'm doing some functions to create some parametric images, but I have problems when writing them. I use spm_create_vol.m function to create a header similar to the PET study with which I work, but when I write with spm_write_vol.m the values are truncated, ie, integers appear instead of doubles. I think the question is what values should be put in pinfo. I put [1, 0, 0] (the scale factor is one, I have certain values and those I want be reflected). However, if used as a header for example, the last frame of my study PET, where pinfo is [0.001387, 0, 0] (and do not understand why this is so) I have no problem, are double values. I hope you can help me. Thank you. PD: sorry, I sent the same mail with other issue.