Almost correct! recon-all -all -s subj1_T1 -i subj1_T1/I0001.dcm -hippocampal-subfields-T1T2 subj1_hipp/I0001.dcm T2hipp Also, this is assuming that you have defined the environment variable SUBJECTS_DIR. Otherwise, you'd need to add the flag -sd <subjectsDirectory>. Cheers, /Eugenio
Juan Eugenio Iglesias Postdoctoral researcher BCBL www.jeiglesias.com www.bcbl.eu Legal disclaimer/Aviso legal/Lege-oharra: www.bcbl.eu/legal-disclaimer ----- Original Message ----- From: "Lara Foland-Ross" <lfol...@stanford.edu> To: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu> Sent: Wednesday, April 6, 2016 12:29:09 AM Subject: Re: [Freesurfer] hippocampal subfield analysis - registered two scans prior to analysis Hi Eugenio, Thank you so much for the quick and helpful reply. I checked the images in Freeview and they actually line up quite nicely! Can you provide further guidance on how to run recon-all once with both the -all and the hippocampal-subfields-T1T2 flags? For example, in my rawdata directory, I have two folders: subj1_T1 and subj1_hipp. I cd'd into the rawdata folder and ran the following with no success: recon-all -all -s subj1_T1 -i subj1_T1/I0001.dcm -hippocampal-subfields-T1T2 subj1_hipp T2hipp Is this directory setup correct? And can you please point out the errors in the above recon-all command? Many thanks again for your help! Lara Lara Foland-Ross, Ph.D. Research Associate Center for Interdisciplinary Brain Sciences Research Stanford University School of Medicine 401 Quarry Road, Room 1356 Stanford, CA 94305-5795 ________________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu <freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Eugenio Iglesias <e.igles...@bcbl.eu> Sent: Tuesday, April 5, 2016 2:32 PM To: Freesurfer support list Subject: Re: [Freesurfer] hippocampal subfield analysis - registered two scans prior to analysis Dear Lara, Two things: 1. You don't need to recon the T2 scan. The recon-all stream only works for T1 data anyway. 2. The registration between the T1 and T2 scans happens internally (with a mri_register command similar to the one you wrote) during the hippocampal subfield segmentation. You only need to coarsely align the T1 and T2 scans manually if the initial alignment between the two is terrible. What happens when you open them both in Freeview? 3. If the alignment is decent, just run recon-all once, with both the -all and the -hippocampal-subfields-T1T2 flags. Feel free to send me the T1 and T2 scans if you are not sure whether they are sufficiently well aligned or not. Cheers, /Eugenio Juan Eugenio Iglesias Postdoctoral researcher BCBL www.jeiglesias.com www.bcbl.eu Legal disclaimer/Aviso legal/Lege-oharra: www.bcbl.eu/legal-disclaimer ----- Original Message ----- From: "Lara Foland-Ross" <lfol...@stanford.edu> To: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu> Sent: Tuesday, April 5, 2016 11:14:39 PM Subject: [Freesurfer] hippocampal subfield analysis - registered two scans prior to analysis Hello, I'm beginning a hippocampal subfield analysis in the beta version of Freesurfer 6.0. I have a whole brain T1-weighted image as well as a high-resolution T2-weighted image of the hippocampus. The T2 weighted image covers the entire hippocampus, but not the whole brain. My understanding (and please correct me if I'm wrong) is that I should first run recon-all on the T1-weighted brain, then run recon-all on the T2-weighted scan using the -hippocampal-subfields-T1T2 flag, but that I must first make sure that the two scans are roughly aligned. I was able to successfully register the T1-weighted scan to the T2-weighted scan using mri_robust_register using the following commands: mri_robust_register --mov wholebrain.mgz --dst hippocampus.mgz --cost nmi --lta wholebrain_to_hippocampus.lta -satit --noinit --nosym mri_convert -at wholebrain_to_hippocampus.lta -rl hippocampus.mgz wholebrain.mgz wholebrain_reg_to_hipppcampus.mgz My plan was then to run recon-all on the newly upsampled, registered wholebrain_reg_to_hippocampus.mgz image. And then run recon-all on the T2-weighted scan using the -hippocampal-subfields-T1T2 flag. However, the resampled whole brain T1-weighted image now has only a partial FOV. Is there a way that I can preserve the full field of view in the T1-weighted scan? I've experimented with mri_coreg and flirt and am at a loss. Many thanks in advance, Lara Lara Foland-Ross, Ph.D. Research Associate Center for Interdisciplinary Brain Sciences Research Stanford University School of Medicine 401 Quarry Road, Room 1356 Stanford, CA 94305-5795 _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer 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 Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
