[MINC-users] Minctracc problem

[Claude LEPAGE]

Hi,

Another suggestion:

When you installed mni_autoreg, you should have with it a perl script named
mritoself that came with it (check subdirectory perl/).

Try the following:
  mritoself -clobber -nothreshold -mi -lsq6 t2.mnc spgr.mnc t2_2_spgr.xfm

This should work on a recent version of minctracc and minc.

bye

Claude


> Hello,
> 
> Vasiliki N. Ikonomidou wrote:
> > I am trying to register a T2-weighted image to an IR-SPGR one, using the 
> > following command for calculating the transform:
> > minctracc -est_center -est_translations -lsq7 -mi t2.mnc spgr.mnc 
> > t2_2_spgr.xfm -clobber
> > This worked out fine for most of my datasets, but for four of them, 
> > after getting the message
> > 
> > WARNING: source volume not UNSIGNED_BYTE, will do conversion now.
> > Converting: ............................................     (which 
> > takes forever)
> This looks like a bug in the minctracc, which version are you using ?
> (run minctracc -version).
> 
> 
> > it gives the message
> > 
> > Not implemented yet in cache_volume_range_has_changed()
> > WARNING: target volume not UNSIGNED_BYTE, will do conversion now.
> > 
> > and then minctracc quits without creating the .xfm file.
> > mri_info gives both source and target volumes to be SHORT(4). minctracc 
> > works if I change the cost criterion, but the results are off.
> > 
> > Any suggestions as to what I might be doing wrong?
> You can try converting problematic images into byte first, and see if 
> minctracc will work:
> 
> mincreshape -unsigned -byte t2.mnc t2_byte.mnc
> mincreshape -unsigned -byte spgr.mnc spgr_byte.mnc
> minctracc -est_center -est_translations -lsq7 -mi t2_byte.mnc 
> spgr_byte.mnc  t2_2_spgr.xfm -clobber
> 
> -- 
> Best regards,
>   Vladimir S. Fonov ~ vladimir dot fonov at gmail dot com
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