[Dcmlib] 2D -> 3D

[Jean-Pierre ROUX]

At 22:53 +0200 16/07/05, Olivier Stern wrote:
>All right ;-) Hope my english is understable ^^
>
>
>I would like to know if it exits a class which transform a slices 
>serie to a 3D volume (if it is possible) and if there's no class, 
>how to do it. This question has certainly been asked but I couldn't 
>find any post in this sense in the archive.


Actually, there is no real '3D' in Dicom.
Volumes are either a of of slices (one slice in each image file), or 
a 'multiframe' file (all the planes in a single file).
If you have to deal with a set of slices, you must 'concatenate' the 
pixels of each one.
This is done 'out of gdcm'.


>In the same idea, how do we visualize a volume ? with vtk ?


gdcm comes with a vtkGdcmReader (derived class of vtkImageReader ) 
that can read a set of files 'ala VTK')
After that, all the VTK abilities are wide open for you.


>I can't understand how we can see the inside of the volume.


It depends on what it contains.
Since you're working on MRI brain images, you'll have to perform some 
thresholding, segmentation, etc, before.
See VTK doc.

HTH

--> Scusi, Luca. Non sabbiavo que non capivi il Francese.
(io, non parlo italiano ;-)
JP

>
> Thanks,
>            Olivier
>
>De : Luca Picello [mailto:luca.picello at libero.it]
>Envoyé : samedi 16 juillet 2005 20:48
>À : Olivier Stern
>Cc : dcmlib at creatis.insa-lyon.fr
>Objet : Re: [Dcmlib] 2D -> 3D
>
>
>
>hello Oliver,
>due to what I can understand (I am Italian ;-) ) could you translate 
>to English for better mine and others understanding please?
>I am very interested to this subject
>
>thank you,
>Luca
>
>
>Olivier Stern wrote:
>
>Bonjour,
>
>Je me demandais si il y avait une classe qui transformait une série 
>de slices en un volume 3D (si c'est réalisable) où tout du moins 
>comment faireŠ Cette question a certainement du être posée, mais en 
>survolant les archives je n'ai pas trouvé de messages 
>correspondants. Dans un même ordre d'idée, comment affiche-t-on un 
>volume ? Avec vtk ? Je n'arrive pas à comprendre comment on peut 
>voir l'intérieur du volume.
>Merci,
>            Olivier
>


  Jean-Pierre ROUX
  CREATIS - CNRS UMR 5515, INSERM U 630
  Laboratoire de Radiologie Experimentale
  Hopital Cardiologique
  28 Avenue du Doyen LEPINE
  B.P. Lyon-Montchat
  69394 Lyon Cedex 03

  Tel      : (+33) 04 72 35 74 12
  Fax      : (+33) 04 72 68 49 16
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  e-mail   : jpr at creatis.univ-lyon1.fr
								   
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