[Camino-users] TEND stepsize

Philip A Cook cookpa at mail.med.upenn.edu
Wed Jul 11 13:26:42 PDT 2012


Hi,

You're right, if deflection is computed at every step it certainly would make the results dependent on step size. In Camino, the tend implementation extends FACT, and hence the tensor deflection only gets applied once per voxel. I'm working on a more general tracking framework that would let you use TEND in other algorithms. In that case you would want to reduce the weight the TEND term if you used smaller step sizes.


On Jul 11, 2012, at 10:21 AM, Peter Neher wrote:

> Hi all, 
> 
> I have another question. I was wondering how the stepsize of the streamline tracking methods is determined if the -stepsize parameter only affects the interpolated case. I guess for FACT it does not matter but the tensor deflection is influenced drastically by the step size. Or is the deflection D*v only applied once per voxel and not at every step?
> 
> Best,
> Peter
> -- 
> Dipl.-Inform. Peter Neher
> German Cancer Research Centre
> (DKFZ, Deutsches Krebsforschungszentrum in der Helmholtz-Gemeinschaft, Stiftung des öffentlichen Rechts)
> Division of Medical and Biological Informatics
> Im Neuenheimer Feld 280, D-69120 Heidelberg
> 
> Phone: 49-(0)6221-42-3552, Fax: 49-(0)6221-42-2345
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> 
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