External Email - Use Caution        

Dear Falk,

thanks for the hint! My understanding was that the "robust" MP2 actually 
reintroduces some of the field inhomogeneity artefacts that MP2RAGE is designed 
to compensate (OBrien Plos One 2014) - that's why I am trying to go with 
skullstripping... That way, the majority of > 100 volumes here is processed 
just fine, too. Don't know what is causing the problem in some.

Best wishes
Cornelius




-----Ursprüngliche Nachricht-----
Von: falk.luesebr...@med.ovgu.de <falk.luesebr...@med.ovgu.de> 
Gesendet: Montag, 31. Januar 2022 10:45
An: 'freesurfer@nmr.mgh.harvard.edu' <freesurfer@nmr.mgh.harvard.edu>
Cc: Dr. Cornelius Kronlage <cornelius.kronl...@med.uni-tuebingen.de>
Betreff: AW: mri_normalize error MP2RAGE

Hi Cornelius,


this doesn't address your issue directly and I may have simply been lucky, 
however, I haven't had any difficulties to process (7T) MP2RAGE data after 
background removal suggested by Marques et al. 
(https://secure-web.cisco.com/1j8Dv_p6-ZO7_HRDNVu0NxLOugspVR5H7LS6K731DKHjw2JwS7JJF2CUj96PqA9nNcONji6VIKsjqko1ITgXr2BIhFIRGHZVTqzTu7fySmJbWD-ZTLkXw24weoEeFDr9RxRasUa98lSmbsM3PWAJ3XTkUpOaTDfCRWIe3bHuvjR5SRNjzyV2yT1npKMosod_VwuFDMAd_Qxj97tUCDZM6fuhEzHT08BNpGHcVxSB4AyUT2CwdYPgKfM8AULAliCeJsDE_csnfOMvxhv98JwJMw_83aNzs-D__zdbbYh1UNTE7-oXztqBiR1i4GhCOJE1yHw8vP0PvOvLN1JQTRtZq-w/https%3A%2F%2Fgithub.com%2FJosePMarques%2FMP2RAGE-related-scripts
 I'd omit the skullstripping, too.


Maybe this helps.


Best,

Falk

________________________________
Von: freesurfer-boun...@nmr.mgh.harvard.edu 
<freesurfer-boun...@nmr.mgh.harvard.edu> im Auftrag von Dr. Cornelius Kronlage 
<cornelius.kronl...@med.uni-tuebingen.de>
Gesendet: Montag, 31. Januar 2022 10:14:22
An: 'freesurfer@nmr.mgh.harvard.edu'
Betreff: [Freesurfer] mri_normalize error MP2RAGE

        External Email - Use Caution

Dear freesurfer experts,

when running recon-all (FS version 7.2.0) on skullstripped 3T MP2RAGE 
sequences, about 10-20% of scans from one scanner fail because of this:

        mri_normalize -g 1 -seed 1234 -mprage nu.mgz T1.mgz

         [...]

        Iterating 2 times
        ---------------------------------
        3d normalization pass 1 of 2
        error: No such file or directory
        error: MRInormFindControlPoints: could not find enough control points
        error: No such file or directory
        error: MRInormFindControlPoints failed
        Command exited with non-zero status 253


nu.mgz as the input to mri_normalize looks good to me. I am of course happy to 
provide full logs and some example data - please let me know.

The exact same problem (also MP2RAGE data) has been described twice before, but 
I couldn't find a solution:
https://secure-web.cisco.com/1r3_UfItk0odyQTEjL22mLAxycj89_vXfN--AkpFwUzred-OQT3ckmk1p9JLbc29ymXguFMzz6rV70r7A9LeDMz_kYEm1cy8e9ibgxgnRwgtJLUfjnfuY7OkKyKDITcG13L9huWbQSuMS4eo6ea1DFHfrbfd9b_1msdUkWpfAFMV_UBe8nf3eVw5dmY-zapW2LYz0tifCErjKgm631dwA8U8RH3BRPmSdKNv6NT8vQmby7TV0Kd5S490MWVKNPO_Ve7SGS1clbqmTblxJRiNt2m0AUFzGrZcY8EQLNhMWPz1sfmDFgZFw999W7vwhhAa5YQXJ8pZbUYMGXMaJJ3dyig/https%3A%2F%2Fwww.mail-archive.com%2Ffreesurfer%40nmr.mgh.harvard.edu%2Fmsg66557.html
https://secure-web.cisco.com/1_dIFX4W-YMl78kLd-J9E7AGEkpzUy7zCtCTsFt-L6nLdAv_ixABY3RDMvbdmBUDMJNZ-4u1RxJGsBMdpoUXKZMDoxX7orbApLXZgx30JCvhLAp31DqNIdIJHJF-OsxyycEnct0FCwOQJric_qQLQ_noGjYTi2qa7coQda6l04uWLmjnF5LIOjIJ7s2L95fZdSdTNaiLBUo1XQjQWPwr7dXmXIDk_ly61SRk8r9EyMv-7Bv5URoFumrNXPLHoWhcyDOgq2i2x7f3gdfB3pTN36GbygyujShpYQdRwE24fPj5sUN9VqAfIvJ1y5JqSahF9u5u07COsUHW5POQQHTK06Q/https%3A%2F%2Fwww.mail-archive.com%2Ffreesurfer%40nmr.mgh.harvard.edu%2Fmsg70463.html

Thanks you in advance and
best wishes

Cornelius



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