[MINC-users] minctracc error after initializationfromregister-based xfm

[Audette, Michel]

Hi again, 

It may be a left ear vs right ear thing, but I was pretty sure up to now that they were both left ear... But it could be that what I am seeing in the patient data is mirror-imaged compared to what I am think I am seeing. 

In fact, I meant to also use a free-form transformation, as opposed to affine nonrigid. I don't have much experience with animal, so I've a bit of reading to do...

Thanks again for your help. 

Michel


-----Original Message-----
From: minc-users-bounces at bic.mni.mcgill.ca on behalf of Andrew Janke
Sent: Fri 8/17/2007 1:40 PM
To: MINC users mailing list
Subject: Re: [MINC-users] minctracc error after initializationfromregister-based xfm
 
On 8/17/07, Audette, Michel <Michel.Audette at medizin.uni-leipzig.de> wrote:

> xfm2param HumanS16885_etzoldCT.xfm gives me the same choking response that I get with minctracc.

Have a hack with this little perl script I wrote a yonk ago as a drop
in replacement for xfm2param that can handle up to 180deg rotations.

   http://packages.bic.mni.mcgill.ca/scripts/xfmdecomp.pl

> Do we care what sampling orientation to give mincresample? I'll go with -use_input_sampling unless you suggest otherwise...

I would guess that given that large transformation that
-tfm_input_sampling would be the best bet as per your next email.

-use_input_sampling is sometimes easier to use given that it will give
you an idea of where your data has gone/rotated to. Given that you
have a rotation of more than 90deg in there I would suspect that your
data is doing some amusing flips and contortions.  These can also be
due to wierd direction cosines but they looked OK in your headers that
you posted before.


a
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