Re: [Freesurfer] ERROR: input(s) cannot have multiple frames!

2018-08-05 Thread Glasser, Matthew
External Email - Use Caution How about running FreeSurfer on your T1w image? Matt. From: mailto:freesurfer-boun...@nmr.mgh.harvard.edu>> on behalf of Renew Andrade mailto:andradere...@yahoo.com>> Reply-To: Freesurfer support list mailto:freesurfer@nmr.mgh.harvard.edu>> Date:

[Freesurfer] ERROR: input(s) cannot have multiple frames!

2018-08-05 Thread Renew Andrade
External Email - Use Caution Hello community! I have an issue while running recon-all -all in a dpi file. What do you suggest as a solution? Thank you! Renes-MacBook-Air-2:~ andraderenew$ recon-all -all -i /Volumes/TOSHIBA_EXT/otros/Académico/Research/image_processing/imaging-

[Freesurfer] Question about run FreeSurfer

2018-08-05 Thread Alexandra Trujillo
External Email - Use Caution Hello, I'm Alexandra, postgraduate student in Argentina. I would like install and run FreeSurfer in Linux, I'm following the instructions of ' https://surfer.nmr.mgh.harvard.edu/fswiki/DownloadAndInstall' and I obtained this output (correctly): Setting

Re: [Freesurfer] SNR covariate in cortical thickness & volumetrics between groups analyses

2018-08-05 Thread John Anderson
External Email - Use Caution Dear Dr Greve and Matt, your valable responses and explanations are highly appreciated!! Thank you so much! From: freesurfer-boun...@nmr.mgh.harvard.edu on behalf of Glasser, Matthew Sent: Sunday, August 5, 2018 6:01 PM To: Freesurfer support list

Re: [Freesurfer] SNR covariate in cortical thickness & volumetrics between groups analyses

2018-08-05 Thread Glasser, Matthew
External Email - Use Caution If you have only two protocols “high quality” and “low quality", you could presumably include a protocol variable as a covariate of no interest, thereby removing any effects that correlate with protocol. For this to work ideally, you would have simi

Re: [Freesurfer] SNR covariate in cortical thickness & volumetrics between groups analyses

2018-08-05 Thread Douglas Greve
I thought I answered this question last week. See my rsponse below I don't think it is correct conceptually.  By including SNR as a covariate, you are saying that you expect the thickness to increase with higher SNR and decrease with lower SNR. This does not make sense to me. It sounds like yo

Re: [Freesurfer] SNR covariate in cortical thickness & volumetrics between groups analyses

2018-08-05 Thread John Anderson
External Email - Use Caution > Dear FS experts, > I would like to inquire about including SNR as a covariate for the between > groups comparison in cortical thickness. Is this procedure valid? I have some > T1 images of low quality and the majority are high in quality. I reviewed

Re: [Freesurfer] Origin of freesusrfer output

2018-08-05 Thread Bruce Fischl
Hi Ritesh you can use the vox2ras matrix to compute the RAS coordinates of any voxel. Just give it column,row,slice,1 indices as the input vector. cheers Bruce On Sun, 5 Aug 2018, Ritesh Mahajan wrote: External Email - Use Caution Thanks Bruce. Thanks Doug for clearing this. Can y

Re: [Freesurfer] Origin of freesusrfer output

2018-08-05 Thread Ritesh Mahajan
External Email - Use Caution Thanks Bruce. Thanks Doug for clearing this. Can you please tell, how can i get back the first voxel of input ? Also, can you tell what mathematical formula or equation is used convert this origin ? Thanks, Ritesh Mahajan - Original Message --