[vtkusers] [Gdcm2] Problem reading RT struct file

[Mark Roden]

Hi Jothy,

You should probably then pipeline the polydata into vtk marching
cubes, rather than try to rewrite the gdcm reader.

Such a pipeline would look like:

polydatareader
polydata to image stencil (produces a binary mask from the contours)
vtkMarchingCubes (volume from the binary mask)

You could put the creation of the binary mask into gdcm, but vtk is
much better suited for this kind of approach.

Mark

On Wed, Mar 9, 2011 at 9:14 AM, Jothy <jothybasu at gmail.com> wrote:
> Yes, but I want to create my own code so that I can create a mesh with
> vtkMarchingCubes.
>
> But, the same code works well for python (the one I posted earlier.
>
>
> Thank you
>
> Jothy
>
>
> On Wed, Mar 9, 2011 at 5:07 PM, Mark Roden <mmroden at gmail.com> wrote:
>>
>> Hi Jothy,
>>
>> Have you looked at the code for the vtkGDCMPolyDataReader class?  That
>> code parses an rtstruct into vtk polydata objects.
>>
>> Mark
>>
>> On Wed, Mar 9, 2011 at 8:50 AM, Jothy <jothybasu at gmail.com> wrote:
>> > Hi all,
>> >
>> > I am trying to read a rt structure file. Butm when the program crashes
>> > on
>> > GetNumberOfItems().
>> >
>> > here is the code
>> >
>> >       gdcm::Reader reader;
>> >
>> >     reader.SetFileName(this->structFileName.toStdString().data());
>> >
>> >     //show error msg if file can't be read.
>> >
>> >     if( !reader.Read() )
>> >
>> >         {
>> >
>> >         QMessageBox msgBox;
>> >
>> >         msgBox.setText("Can not read the file!");
>> >
>> >         msgBox.setIcon(QMessageBox::Critical);
>> >
>> >         msgBox.exec();
>> >
>> >         }
>> >
>> >     reader.Read();
>> >
>> >     gdcm::File &file = reader.GetFile();
>> >
>> >     // the dataset is the the set of element we are interested in:
>> >
>> >     gdcm::DataSet &ds = file.GetDataSet();
>> >
>> >     gdcm::Tag troicsq (0x3006,0x0020); // Structure set ROI sequence tag
>> >
>> >     gdcm::DataElement de=ds.GetDataElement(troicsq);
>> >
>> >     gdcm::SequenceOfItems* roicsq=de.GetSequenceOfItems();
>> >
>> >     qDebug()<<roicsq.GetNumberOfItems();
>> >
>> > It says - request for member "GetNumberOfItems" in "roicsq" ,which is of
>> >
>> > non-class type gdcm::SequenceOfItems*.
>> >
>> > Any hints, what's wrong here?
>> >
>> > Thank you
>> >
>> >
>> > Jothy
>> >
>> >
>> >
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