[Insight-users] FW: Problem with Demons Variant Deformable Registration

[Nithiananthan, Sajendra]

Torsten,

Thanks for the response and pointing me to Tom's implementation.
You mentioned there are known problems with the existing implementation,
could you point me to the mailing list posts about them? I am not sure if I
found them all during my search.
I did try Tom's implementation of the fast symmetric force thanks to your
suggestion. It worked well, but didn't "converge" in quite as few
implementations as the  symmetric forces or fast symmetric forces code that
ships with ITK (3.2). But it isn't painfully slow like the former, or have
the problems I mentioned previously in the latter. If it is possible to get
the best of both worlds I would want to investigate it, or is the fast
symmetric implementation that ships with ITK a lost cause? Has anyone else
had any experience using it?

Thanks,
Sajendra 


> -----Original Message-----
> From: Torsten Rohlfing [mailto:torsten at synapse.sri.com]
> Hi Sajendra --
> 
> There are some known problems with the fast symmetric demons 
> forces code 
> currently in ITK. These have been discussed on the mailing list, but 
> were never resolved.
> 
> Here's an idea though: Tom Vercauteren of INRIA has provided a vastly 
> improved variant of the demons algorithm, including among 
> other features 
> also a working fast symmetric forces implementation. I 
> believe his code 
> is currently in the Review/ directory of the ITK source tree. In any 
> case, you can also get his original implementation from the 
> InsightJournal website:
> 
>  
> http://insight-journal.org/InsightJournalManager/view_publicat
> ion.php?back=search.php%3Ftexte%3Dvercauteren&pubid=154
> 
> My suggestion would be for you to give Tom's code a try. 
> Maybe that will 
> solve your problems.
> 
> Best,
>   Torsten
> 
> -- 
> Torsten Rohlfing, PhD          SRI International, Neuroscience Program
>  Research Scientist             333 Ravenswood Ave, Menlo 
> Park, CA 94025
>   Phone: ++1 (650) 859-3379      Fax: ++1 (650) 859-2743
>    torsten at synapse.sri.com        http://www.stanford.edu/~rohlfing/
> 
>      "Though this be madness, yet there is a method in't"

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