[MINC-users] mritotal crashes on bullcalf....

[Andrew Janke]

On Fri, 8 Oct 2004, Roy Yves wrote:

> I ran mritotal (see below) and it crashes in minctracc... I was just wondering
> if it can be due to some sort of corruption in the MINC image resulting from
> the conversion from DICOM to MINC.

The error looks to be caused by volume_cog not being able to find a COG (Centre
of Gravity) of the input volume. Is in input volume what you would call "normal"
with respects to image range?  ie: when loaded in something like register, is
the image very dark?

> On (probably) another note, I notice that the minc header in the converted
> files contains less information and in a different format (XML) than if the
> conversion was done using dcm2mnc for example. Do you think it can be related
> to the problem?

I would sincerely hope not. :)  Essentially it just means that the converters
treat the "Extra" header informatin in different ways.  And likely in the ways
that best suited the particular authours of the individual scripts.

> bullcalf 108% mritotal doyon_ansa_irmf-sonata-21247-20040303-175816-18.mnc
> subj2.xfm .. .. /usr/local/mni/bin/minctracc
> /var/tmp/mritotal_1357678/doyon_ansa_irmf-sonata-21247-20040303-175816-18_16_blur.mnc
> /usr/local/mni/data/mni_autoreg/average_305_16_blur.mnc
> /var/tmp/mritotal_1357678/doyon_ansa_irmf-sonata-21247-20040303-175816-18_16.xfm
> -est_translations -lsq7 -xcorr -center No COG can be calculated -step 4 4 4
> -tol 0.01 -simplex 20

--
Andrew Janke (rotor@cmr.uq.edu DOT au || www.cmr.uq.edu.au/~rotor)
Australia->University of Queensland->Centre for Magnetic Resonance
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