[Insight-users] Creating 3D images based on slices

[Wagner Sales]

Hi Luis,

Luis Ibanez wrote:

>
> Hi Wagner,
>
> Are your slices being stored in independent files ? 

Here is the problem... Are not! But I have the data in memory, but I can 
convert to every format. In last case, pixel by pixel... ;)
I have the position z-axis position too... Well, if have like do this 
withou using the serie readers, like in VTK ( vtk have one too ), better 
to me. But if not have, or are must difficult, 'll change my program... 
no problem.
Thks.

>
>
> If so, you can simply use the ImageSeriesImageReader.
> You will find examples in the directory:
>
>        Insight/Examples/IO
>
> they are:
>
>        DicomSeriesReadImageWrite.cxx
>        ImageReadImageSeriesWrite.cxx
>        ImageSeriesReadWrite.cxx
>        RGBImageSeriesReadWrite.cxx
>
>
>
> This will create a 3D image with the collection of
> 2D image from your files.
>
> It is still *your* responsibility to setup the Z
> pixel spacing, since the reader has no other way to
> figure out this value. (DICOM probably can...).
>
> You can use the itkChangeInformationImageFilter for
> the purpose of setting such pixel spacing.
>
> There is no interpolation involved in this process.
> The 3D image will be just a concatenation of slices.
>
>
> If your slices do not correspond to a uniform
> sampling along Z.... then.... you are in trouble...  :-/
>
> Are they at least parallel  ? ...
>
> The brute force approach will be to use KernelSplines
> in order to interpolate intensity values... that will
> work... but is not going to be fast.
>
>
>    Regards,
>
>
>       Luis
>
>
>
> ------------------------
> Wagner Sales wrote:
>
>> Hi,
>>
>> First, thank's by the last help. like you all probabily know, I need 
>> to use a volume in ITK. You told me to use a itkImage with dimension 
>> = 3. I looked in the examples, and i'm convinced that that's the 
>> right way to do it. But, now I have a different problem... like I 
>> said before, I need to fill this 3-dimensional itkImage with n 
>> 2-dimensional images. So, my current problem is how o put n 
>> differents images into the 3D image, and, furthermore, how to specify 
>> the coordinates of the images in the 3D one (the z-axis). After that, 
>> I need to interpolate the images, because my slices aren't 
>> contiguous, I was looked how to set the space between the images. Are 
>> just that? I don't need to specify the interpolation?
>>
>> Thanks,
>>
>> Wagner
>>
>>
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>>
>
>
>
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