External Email - Use Caution of course: I run the same line of command for both amyloid and tau pet images with a fwhm = 1 in order to see what have happened
mri_gtmpvc --i taupet.nii --reg tau.reg.lta --psf 1 --seg gtmseg.mgz --auto-mask 1 .01 --mgx .01 --no-rescale --o tau.output mri_gtmpvc --i amypet.nii --reg amy.reg.lta --psf 1 --seg gtmseg.mgz --auto-mask 1 .01 --mgx .01 --no-rescale --o amy.output when I extract gtm.stats.dat file and I compare the number of voxels for the same regions (and for the same subject of course) I obtain these values (attached files). Can I suppose this effect descends from the flag --automask? maybe the different automatic masks lead to different pixel size.. I don't know, I would be very grateful for any information. Thanks for all the help you can give me about; sincere greetings from Federica Di Antonio Il giorno lun 6 mar 2023 alle ore 16:31 Douglas N. Greve < dgr...@mgh.harvard.edu> ha scritto: > can you send an example? > > On 2/17/2023 9:38 AM, Federica Di Antonio wrote: > > External Email - Use Caution > Dear experts, > > I hope this email finds you well. > I run the pvc correction with mri_gtmpvc for subjects data obtained with > two different PET tracers. > In gtm.stats.dat, for every subject and every region, the number of voxels > evaluated for amyloid tracer is approximately twice the volume evaluated > for the second tracer. > I'd expect that the volume of a region for the same subject doesn't change > with the tracer. > > Do you think this error can result from previous errors in the analysis? > Or is it in some way plausible? > > Thank you for your patience, > Federica > > > _______________________________________________ > Freesurfer mailing > listfreesur...@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://secure-web.cisco.com/1VM0gR7PtCdMPFYb3L3zfpgwLUWOX8ubtu2o8dbtq5I-tn9z-7soFv7DH5K8EI2bXLuPaSVv-pYMQyZnsgcedSe6v2dFI-gCGF9h2Pl5k2HHdfHuFVvttvbYCB76-RfjeonptcGdckMyjrR8SivpZwLeVolohwCwWZuRbVLqgtfPXyNBBkrwyTDkwo4ThVWyeycvGN3ROzwz78sna6jOLJAV7L2V2cZ_knNVHqjIenDjW28q83rww6CROiF8mnX5LuD30GsESQSdqjAcCfMoPObkHj-ODhSRDT6MNa_M8GC1Uz09z6sW1mJL3O6wcHqLrXjH9W3lj8VzbmxusyxirqA/https%3A%2F%2Fmail.nmr.mgh.harvard.edu%2Fmailman%2Flistinfo%2Ffreesurfer > The information in this e-mail is intended only for the person to whom it > is addressed. If you believe this e-mail was sent to you in error and the > e-mail contains patient information, please contact the Mass General > Brigham Compliance HelpLine at > https://secure-web.cisco.com/1x7rDMr7odbpYAD4E4Mm3_G0LekUdeH2QliAm_KNo9VP1-c7w5EFJLRth_aZQxbg2piPt0DZaGdpQOHxJBaZWoW3MbOOZXGZOC-pgYljldgaALriyAdJPC7jrdT_xfXQOZQZ_gu39akDgJp2bLuLgeLCW5NeswI-vLZQ-7QeWTKHAsxArzI_aohlxArk4mHLvMfUPgw8ukGgwWGPf2gps01jU9n6SbFkkDgXfhnB7eaFMW-6ZPBKsR58z5HuUr6U-qeUdjoJ2z21OZn0w42wWhsnA4hr6aQOzCGbQRFY6I_vIq_lq0qhYinsvaSFS5cdesoSew_LdDm1VfyhC6giPZw/https%3A%2F%2Fwww.massgeneralbrigham.org%2Fcomplianceline > < > https://secure-web.cisco.com/1x7rDMr7odbpYAD4E4Mm3_G0LekUdeH2QliAm_KNo9VP1-c7w5EFJLRth_aZQxbg2piPt0DZaGdpQOHxJBaZWoW3MbOOZXGZOC-pgYljldgaALriyAdJPC7jrdT_xfXQOZQZ_gu39akDgJp2bLuLgeLCW5NeswI-vLZQ-7QeWTKHAsxArzI_aohlxArk4mHLvMfUPgw8ukGgwWGPf2gps01jU9n6SbFkkDgXfhnB7eaFMW-6ZPBKsR58z5HuUr6U-qeUdjoJ2z21OZn0w42wWhsnA4hr6aQOzCGbQRFY6I_vIq_lq0qhYinsvaSFS5cdesoSew_LdDm1VfyhC6giPZw/https%3A%2F%2Fwww.massgeneralbrigham.org%2Fcomplianceline> > . >
1_AMY_VOL_NEW.dat
Description: Binary data
1_TAU_VOL_NEW.dat
Description: Binary data
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