[Insight-users] DRR generation

[Luis Ibanez]

Hi Sven,

Thanks for giving us more details about
the problem that you are facing.



Could you please try the following:


1) In line 278,
    Replace the pixel type of the *output* image with "signed short".

2) Rebuild the application

3) Rerun the example with your input image, and use
    a .mha extension for the filename of the output image.

4) Use the ImageViewer application,
    or ParaView (www.paraviewe.org) or Slicer (www.slicer.org)
    for viewing the output image.

5) If the image still doesn't look right.
    Please post the .mha image in a public web site
    and send us a link, so that we can inspect the output.



   Regards,


      Luis


---------------------
Fischer, Sven wrote:
> Hi Luis,
> 
> Thank you for your reply. 
> I use signed short as input and unsigned char as output pixel type. I already tried it with other data and it worked fine. 
> When I use signed char as input pixel type the image looks like a very noisy DRR. When I use only a few slices of the problematical CT (with signed short as input pixel type) I can see some structures.
> I think you're right that the circle is the projection of the cylindrical tunnel of the CT scan.
> 
> Cheers,
> Sven
> 
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: Luis Ibanez [mailto:luis.ibanez at kitware.com] 
> Gesendet: Samstag, 19. April 2008 18:49
> An: Fischer, Sven
> Cc: insight-users at itk.org
> Betreff: Re: [Insight-users] DRR generation
> 
> 
> Hi Sven,
> 
> You probably have a pixel type issue.
> 
> I would guess that the circle that you are seeing is the projection
> of the cylindrical tunnel of the CT scan.
> 
> What is the pixel type of your input and output images ?
> 
> 
> Please let us know,
> 
> 
>      Thanks
> 
> 
>         Luis
> 
> 
> ----------------------
> Fischer, Sven wrote:
> 
>>Hi all,
>>
>> 
>>
>>I'm new in medical application. I've tried to create a DRR out of a 
>>DICOM Image Series. First I created a volume image from the DICOM 
>>Series, with ImageSeriesReader, GDCMSeriesFileNames and GDCMImageIO. 
>>Then I tried to create the DRR like in the 
>>DigitallyReconstructedRadiograph1.cxx example. Now my problem is that I 
>>only get a circle as Output. The Size of the DICOM images is 128x128 
>>with 488 slices. The spacing is 2.88, 2.88, 0.79. Does anyone know what 
>>my problem could be? Thanks.
>>
>> 
>>
>>Cheers,
>>
>>Sven
>>
>>
>>------------------------------------------------------------------------
>>
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> 
>