[Insight-users] Reading Dicom files

[Bill Lorensen]

Andrew,
You can still get at this information. We store all dicom tags in the meta
data dictionary for the image. Look at the dicom processing examples in
Examples/IO to see how to get the meta data dictionary. Once you have it,
you can use the ExposeMetaData method to get the values for a given tag.

Bill


On 6/1/06, Hoole, Andrew <andrew.hoole at addenbrookes.nhs.uk> wrote:
>
>   Hi Bill
>
>
>
> The image which I have been using is a DRR from our planning system -
> RTImage modality. I have looked in the DICOM and the spacing is in
> (0x3002,0x0011) and the position is in  (0x3002,0x0012). This is probably
> the issue - it handles normal images not DICOM RT images.
>
>
>
> *Andrew Hoole *
>
> -------------------------------------------------------------------------
>
> Medical Physics, Box 152
>
> Cambridge University Hospitals NHS Trust
> Addenbrooke's Hospital
>
> Hills Rd
>
> Cambridge         Tel: (+44) (0)1223-216544
>
> CB2 2QQ           Fax: (+44) (0)1223-257137
>
> UK                    Email: andrew.hoole at addenbrookes.nhs.uk
>
> --------------------------------------------------------------------------
>
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>
> -----Original Message-----
> *From:* Bill Lorensen [mailto:bill.lorensen at gmail.com]
> *Sent:* 01 June 2006 17:35
> *To:* Hoole, Andrew
> *Cc:* insight-users at itk.org
> *Subject:* Re: [Insight-users] Reading Dicom files
>
>
>
> Andrew,
>
>
>
> The reader does read the pixel spacing and origin. What is the source of
> your dicom images?
>
>
>
> Bill
>
>
>
> On 6/1/06, *Hoole, Andrew* <andrew.hoole at addenbrookes.nhs.uk> wrote:
>
> Hi All
>
>
>
> I'm new to the ITK stuff and having been working through the User guide. I
> have used the code in the guide to read a DICOM file and display it in a
> window. When I read the file it doesn't appear to read the information
> related to the pixel size or the origin of the image. This information is
> embedded in the DICOM is there a way to make the reader get this data or is
> the problem with the image which I hook onto the output of the reader. The
> code I am using is as follows:
>
>
>
>             typedef signed short InputPixelType;
>
>             const unsigned int   InputDimension = 2;
>
>
>
>             typedef itk::Image< InputPixelType, InputDimension >
> InputImageType;
>
>             typedef itk::ImageFileReader< InputImageType > ReaderType;
>
>
>
>             ReaderType::Pointer reader = ReaderType::New();
>
>             reader->SetFileName("c:\\temp\\test.dcm");
>
>             typedef itk::GDCMImageIO           ImageIOType;
>
>
>
>             ImageIOType::Pointer gdcmImageIO = ImageIOType::New();
>
>
>
>             reader->SetImageIO( gdcmImageIO );
>
>             try {
>
>                         reader->Update();
>
>             }
>
>             catch (itk::ExceptionObject & e){
>
>                         AfxMessageBox("Exception in file reader
> ",MB_OK,NULL);
>
>                         return;
>
>             }
>
>
>
>             typedef itk::Point< double, InputImageType::ImageDimension >
> PointType;
>
>             PointType point;
>
>             InputImageType::IndexType pixelIndex;
>
>             InputImageType::PixelType pixelValue;
>
>             InputImageType::Pointer image = reader->GetOutput();
>
>
>
>             InputImageType::SpacingType spacing;
>
>             spacing[0] = 0.5; // spacing along X
>
>             spacing[1] = 0.5; // spacing along Y
>
>             image->SetSpacing( spacing );
>
>
>
>             InputImageType::PointType origin;
>
>             origin[0] = -128.0; // coordinates of the
>
>             origin[1] = -128.0; // first pixel in N-D
>
>             image->SetOrigin( origin );
>
>
>
> As you can see I am manually setting the pixel size and origin which is
> not ideal.
>
>
>
> Regards
>
>
>
> *Andrew Hoole *
>
> -------------------------------------------------------------------------
>
> Medical Physics, Box 152
>
> Cambridge University Hospitals NHS Trust
> Addenbrooke's Hospital
>
> Hills Rd
>
> Cambridge         Tel: (+44) (0)1223-216544
>
> CB2 2QQ           Fax: (+44) (0)1223-257137
>
> UK                    Email: andrew.hoole at addenbrookes.nhs.uk
>
> --------------------------------------------------------------------------
>
> The information contained in this EMAIL and any attachments is
> confidential and intended solely for the attention and use of the intended
> recipient. If you are not the intended recipient and have received this
> email in error you may not disclose, copy, distribute or retain this message
> or any part of it.
> See *Email disclaimer <*http://www.addenbrookes.org.uk/email_disclaimer.html
> *>*
>
>
>
>
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>
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