[vtk-developers] vtkDICOMImageReader

[Bartosz Wiklak]

Thank you for whole help and info.
Could you please give me some examples how to user gdcm
vtkGDCMImageReader and connect data to renderer/mapper?
I cant find any.

Bartek

On Mon, Jul 21, 2008 at 4:17 PM, Mathieu Malaterre
<mathieu.malaterre at gmail.com> wrote:
> GDCM has recently integrated Part 3 and it does support J2K from Part
> 5. This is IMHO the biggest advantage in using GDCM over dcmtk. The
> main drawback would be a missing network implementation.
>
> -Mathieu
>
> On Mon, Jul 21, 2008 at 2:55 PM, Bartosz Wiklak <bwiklak at gmail.com> wrote:
>> Thanks a lot,
>> I have big experience in DCMTK. Of course it does implement much more
>> than Dicom Part5 standard but it would be nice not to include to many
>> different implementations of the same standard in one application.
>> I have heard that some people include dcmdata pixels (f.e. decoded
>> using dcmtk) into VTK object.
>> Does anyone have experience in this field?
>>
>> Bartek
>>
>> On Mon, Jul 21, 2008 at 1:47 PM, Mathieu Malaterre
>> <mathieu.malaterre at gmail.com> wrote:
>>> If you have a chance give a try to GDCM:
>>>
>>> http://gdcm.sourceforge.net/wiki/index.php/GDCM_Release_2.0
>>>
>>> it has a vtkGDCMImageReader and a gdcm::IPPSorter. Pluging them
>>> together should do what you want:
>>>
>>> http://gdcm.sourceforge.net/html/classvtkGDCMImageReader.html
>>>
>>> http://gdcm.sourceforge.net/html/classgdcm_1_1IPPSorter.html
>>>
>>> HTH
>>> -Mathieu
>>>
>>> On Mon, Jul 21, 2008 at 1:18 PM, Bartosz Wiklak <bwiklak at gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I'm new to VTK but I'm very impressed by it's capabilities.
>>>> I'm specially interested in medical 3D visualization (CT,MR,PET).
>>>> I have already learned haw to use many VTK methods and also how to
>>>> read DICOM data through vtkDICOMImageReader. Here my question begins.
>>>>
>>>> In many dicom data sets (scans) spacing between slices in not the same
>>>> in whole 3D object (f.e series).
>>>> To make things worse tags such as SliceLocation,  SpacingBetweenSlices
>>>> have comonly bad values.
>>>>
>>>> Good information about slice positions in 3D is always (in Dicom 3
>>>> compilant images) stored in:
>>>> Image Orientation (Patient) (0020,0037),
>>>> Image Position (Patient) (0020,0032).
>>>>
>>>> Standard says about this In PS 3.3:
>>>>
>>>> C.7.6.2.1.1 Image Position And Image Orientation
>>>> The Image Position (0020,0032) specifies the x, y, and z coordinates of the
>>>> upper left hand
>>>> corner of the image; it is the first pixel transmitted. Image Orientation
>>>> (0020,0037) specifies the
>>>> direction cosines of the first row and the first column with respect to the
>>>> patient. These Attributes
>>>> shall be provide as a pair. Row value for the x, y, and z axes respectively
>>>> followed by the Column
>>>> value for the x, y, and z axes respectively.
>>>>
>>>> The direction of the axes is defined fully by the patient's orientation.
>>>> The x-axis is increasing to the
>>>> left hand side of the patient. The y-axis is increasing to the posterior
>>>> side of the patient. The z-axis
>>>> is increasing toward the head of the patient.
>>>>
>>>> I'm sure that in some of my datasets that not have homogenious spacing
>>>> between slices the data shown in VTK is bad.
>>>>
>>>> I would like to contibute in VTK and help to imporve
>>>> vtkDICOMImageReader but I need some help to start.
>>>> I need to know how exacly vtkDICOMImageReader creates VTK 3D dataset,
>>>> and if there is possibility to construct anisotropic data tor
>>>> vizsualiztion without need to use interpolation to force isotropy.
>>>>
>>>> I have read vtkDICOMImageReader code but after quick look I cant find
>>>> place where data is build.
>>>>
>>>> Maybe someone can help me to make a few first steps?
>>>>
>>>> Bartek
>>>> _______________________________________________
>>>> vtk-developers mailing list
>>>> vtk-developers at vtk.org
>>>> http://www.vtk.org/mailman/listinfo/vtk-developers
>>>>
>>>
>>>
>>>
>>> --
>>> Mathieu
>>>
>>
>
>
>
> --
> Mathieu
>