[Insight-users] Rigid3DPerspectiveTransform

[hbzhang at vt.edu]

We need the person like Luis for ITK

HB


Quoting Luis Ibanez <luis.ibanez at kitware.com>:

>
> Hi Peter,
>
> You may find useful the instructions on the following email:
> http://www.itk.org/pipermail/insight-users/2006-January/016377.html
>
> regarding the use of the DigitallyReconstructedRadiograph1.cxx example
>
>
> For a synthetic cube image, you can use the following command line:
>
>
>     DigitallyReconstructedRadiograph1 -t -90 -90 -90 -o CubeDRR.img
>
>
> For a real image you can use the following:
>
>
>     DigitallyReconstructedRadiograph1 -t -90 -109 -90
>                           -o brain.img  brainweb165a10f17.mhd
>
>
> (in a single line)
>
> The brainweb image can be downloaded from the Data page of www.itk.org:
>
>               http://www.itk.org/HTML/Data.htm
>               ftp://public.kitware.com/pub/itk/Data/BrainWeb
>
>
>
>     Regards,
>
>
>
>        Luis
>
>
> -----------------------------
> Boettcher, Dr. Peter wrote:
> > Dear Bill
> >
> >
> >
> > Yes I already used the
> > Insight/Examples/DigitallyReconstructedRadiograph1.cxx example.
> > Unfortunately I have problems defining the proper transformation.
> > Instead of transforming the object (e.g. bone volume) the virtual C-arm
> > is rotated as well as translated around the image volume. When I define
> > only a rotation or a translation every thing works fine. However when I
> > apply both rotation as well as translation the result is not what I
> > expected.
> >
> >
> >
> > Using a parallel projection for the generation of DRR would be of less
> > value for me as I would like to match those DRRs to a real fluoroscopic
> > image. In fact I must admit that I miss a function like
> > itkRayCaster-SetViewAngle(). As the itk::ResampleImageFilter defining
> > the dimensions as well as the image resolution of the DRR is generated
> > after the itk::RayCaster has done its work suggests, that the projection
> > angle at which the RayCaster calculates the DRR is fixed.
> >
> >
> >
> > However if anyone could explain me the proper usage of
> > DigitallyReconstructedRadiograph1.cxx, maybe that will solve my problem.
> > Anyway I thought using itk::Rigid3DPerspectiveTransform would be more
> > efficient as it has been especially designed to generate DRRs ;-)
> >
> >
> >
> >
> >
> >
> >
> > Regards, Peter.
> >
> >
> >
> >
> > ------------------------------------------------------------------------
> > *Von:* Bill Lorensen [mailto:bill.lorensen at gmail.com]
> > *Gesendet:* Mo 21.04.2008 18:42
> > *An:* Boettcher, Dr. Peter
> > *Cc:* insight-users @ itk. org
> > *Betreff:* Re: [Insight-users] Rigid3DPerspectiveTransform
> >
> > Peter,
> >
> > I the past at GE, we generated DRR's using the ExpNegativeImageFilter
> > and AccummulateImageFilter. These resulted in parallel projections
> > along each of the major planes, not Perspective projections. I do
> > recall that we also successfully generated arbitrary DRR's with
> > Insight/Examples/DigitallyReconstructedRadiograph1.cxx. I have no
> > experience with similar code in InsightApplications. Which code were
> > you using in InsightApplications?
> >
> > Bill
> >
> > On Mon, Apr 21, 2008 at 11:13 AM, Boettcher, Dr. Peter
> > <Boettcher at kleintierklinik.uni-leipzig.de> wrote:
> >  >
> >  > I try to use Rigid3DPerspectiveTransform for the generation of digitally
> >  > reconstructed radiographs (DRR). The example within the
> > ITKApplication uses
> >  > the RayCaster instead of Rigid3DPerspectiveTransform. Searching the
> > mailing
> >  > list as well as the web I did not find any example on how to use that
> >  > filter. The testing script does only transform points and not an image
> >  > volume.
> >  > I suppose I will have to declare Rigid3DPerspectiveTransform as my
> >  > transformer. In additon to that I will need an image resample filter
> > and an
> >  > interpolator. However pluggin those components together does not work.
> >  >
> >  > ImageResampleFilter->SetTransform(Rigid3DPerspectiveTransform) does ot
> >  > compile.
> >  >
> >  > Regards, Peter.
> >  >
> >  >
> >  > _______________________________________________
> >  > Insight-users mailing list
> >  > Insight-users at itk.org
> >  > http://www.itk.org/mailman/listinfo/insight-users
> >  >
> >  >
> >
> >
> > ------------------------------------------------------------------------
> >
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