[Insight-users] medial curve image filter
Ferreira, Filipa I
F.Ferreira at kingston.ac.uk
Thu Oct 21 06:00:10 EDT 2010
Hi,
Does anyone have access to ITK MedialCurveImageFilter.cpp ?
Regards,
Filipa
-----Original Message-----
From: insight-users-bounces at itk.org [mailto:insight-users-bounces at itk.org] On Behalf Of Erik Tuerke
Sent: 21 October 2010 09:35
To: insight-users at itk.org
Subject: [Insight-users] Registration of one sub-brain to full-brain
Hi!
I want to register one hemisphere (actually 30 slices of 0.75 mm) to a
fullbrain scan (30 slices of 0.75mm, but shifted to superior for about 5
mm) . Currently i am using a MattesMutualInformationImageToImage metric,
a RegularStepGradientDescentOptimizer and a VersorRigid3DTransform.
Prior to the registration the hemisphere is roughly aligned to the
fullbrain (only needs translation of few mm and little rotation). If i
start the registration the optimizer finishes with a rotation of about
90 deg x and y. I also tried a VersorRigid3DOptimizer and a
NormalizedCorrelation with almost the same result.
The scalefactors of my optimizer are:
optimizerScaleRegularStepGradient[0] = 1.0;
optimizerScaleRegularStepGradient[1] = 1.0;
optimizerScaleRegularStepGradient[2] = 1.0;
optimizerScaleRegularStepGradient[3] = 1.0/1000.0;
optimizerScaleRegularStepGradient[4] = 1.0/1000.0;
optimizerScaleRegularStepGradient[5] = 1.0/1000.0;
I guess the itk examples are proposing the same values.
Is there any trick to apply such a sub-brain registration to a
full-brain registration. The worrying thing is that SPM gets it right :-(
Thanks and best regards!!
--
Erik Tuerke
Department of Neurophysics
Max-Planck-Institute for Human Cognitive and Brain Sciences
Stephanstrasse 1A
04103 Leipzig
Germany
Tel: +49 341 99 40-2440
Email: tuerke at cbs.mpg.de
www.cbs.mpg.de
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