[Insight-users] getting an flat picture from dicom volume

[Luis Ibanez]

Hi Hadi,

Thanks for your clarifications and for posting the pictures.

I'm afraid however that your description is still confusing.

What you call a "flat picture":

     is it a slice ?
     or a projection image ?

Here is what I can suggest,

Please download Slicer  (www.slicer.org) and play with its
visualization functioalities (slicing and volume rendering)
and let us know which one of them is closer to what you
want to do.

With that information we will be able to suggest you way
of doing this by using ITK and/or VTK.


--

If the diagram in the second picture is what you want to
get, then you could do this

in ITK by using the itk::ResampleImageFilter,
http://www.itk.org/Insight/Doxygen/html/classitk_1_1ResampleImageFilter.html

or in VTK by using the vtkImageReslice class
http://www.vtk.org/doc/nightly/html/classvtkImageReslice.html

Note that in either case you have to pass to the filter
the information about the orientation of the line.



    Regards,


        Luis


-------------------
Hadi Rezaee wrote:
> Dear Luis,
> 
> Thanks alot for your reply.
> 
> I'm so sorry i am very newbie on this field.
> I've checked the samples but i couldn't use the code
> for my purpose, because i simply donno about concepts.
> 
> I'm also worry that i couldnt say my question clearly.
> So, please check out the picture:
> 
> http://www.freeimagehosting.net/uploads/c9c85bac6f.jpg
> 
> As you can see in the picture, the user specify a line
> in first picture of a dicom serie.
> So i should make an flat picture from where the user
> wants to get. this flat picture should be generated
> from the volume i have created for this dicom serie.
> 
> about Vtk i have a question, i used
> vtkImagePlaneWidget object to store and display a
> selected slice :
> 
> http://www.freeimagehosting.net/image.php?b3495f819c.jpg
> 
> but i donno by which method i can save the
> vtkImagePlaneWidget object output to jepg image.
> 
> Please help me.
> 
> Regards,
> 
> 
> --- Luis Ibanez <luis.ibanez at kitware.com> wrote:
> 
> 
>>Hi Hadi,
>>
>>You may want to use the ProjectionFilters:
>>
>>See the derived classes of:
>>
> 
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ProjectionImageFilter.html
> 
>>A common choice is to use the
>>
>>      itkMaximumProjectionImageFilter.h
>>
>>
>>Please note that these filters will compute
>>projections
>>for lines that are parallel to the image axis.
>>
>>If you have a line that is not parallel then you
>>should consider the methods used for Digitally
>>Reconstructed
>>Radiographs (DRR) illustrated in
>>
>>
>>   InsightApplications/
>>       IntensityBased2D3DRegistration/
>>                 GenerateProjection.cxx
>>
>>
>>That being said...
>>If you are generating this flat image for the sole
>>purpose of visualization, then you will have a lot
>>more flexibility by doing Volume Rendering with VTK.
>>
>>
>>
>>    Regards,
>>
>>
>>
>>        Luis
>>
>>
>>
>>----------------------
>>Hadi Rezaee wrote:
>>
>>>Dear all,
>>>
>>>i've made an volume from a series of dicom files
>>
>>via
>>
>>>itk and i can simply show the volume with vtk by
>>
>>using
>>
>>>itk::ImageToVTKImageFilter without any problem.
>>>
>>>What i want to do is to specify a line on the
>>
>>volume
>>
>>>and save the flat picture.
>>>
>>>let me clear my self. let's say i have 50 dicom
>>>images. after i made the volume from these images,
>>
>>i
>>
>>>want user to give me two points on the top image
>>
>>that
>>
>>>i will show him ,for example: X= 10,10 Y=40,40 .
>>
>>by
>>
>>>specifying a line on a picture i want to get the
>>
>>flat
>>
>>>picture from volume and save it to a file. 
>>>this flat picture should be produce from 3d volume
>>
>>by
>>
>>>scanning all below layers.
>>>
>>>please help me, it is so urgent.
>>>
>>>
>>>      
>>>_______________________________________________
>>>Insight-users mailing list
>>>Insight-users at itk.org
>>>http://www.itk.org/mailman/listinfo/insight-users
>>>
>>
> 
> 
> 
>       
>