[vtkusers] Convert VTK 3D world coordinates to 3D DICOM coordinate

[Hongsongyang]

What kind of 3D DICOM coordinate do you want?
I know the DICOM tags you listed and the vtk coordinates.
But I do not know your 3D DICOM coordinate.

> -----Original Message-----
> From: vtkusers-bounces at vtk.org 
> [mailto:vtkusers-bounces at vtk.org] On Behalf Of ericphd
> Sent: Wednesday, May 22, 2013 5:29 PM
> To: vtkusers at vtk.org
> Subject: [vtkusers] Convert VTK 3D world coordinates to 3D 
> DICOM coordinate
> 
> Hello All,
> 
> * Sorry to re post this but i should have sent it VTK user 
> instead of VTK developer.
> 
> First of all, I don't use VTK/ITK tool at all. However, I 
> have a set of 3D
> annotations(coordinates) which are generated by ITK/VTK. The 
> annotations are saved in .txt file and each of the 
> annotations are based on the prostate MRI DICOM images. 
> Previous developers developed the tool and radiologists used 
> it to make the annotations and the tool saved the annotations 
> in .txt file.
> 
> So now I have the DICOM images and 3D annotations (coordinate 
> points) for each of the images. What I want to do is to 
> convert those 3D annotations into 3D DICOM coordinate. If i 
> can get this solved then I will write my MatLab script to 
> convert the 3D DICOM coordinates into an image plane 2D 
> coordinate. I have the formula to convert from 3D DICOM 
> coordinates into 2D coordinates but I don't know how to 
> convert from 3D world coordinate (generated by VTK) into 3D 
> DICOM coordinates.
> 
> For instance;
> Given the following info:
> 0020,0032  Image Position (Patient): -88.985817\-139.832184\-17.698400
> 
> 0020,0037  Image Orientation (Patient):
> 0.998675\0.045472\-0.024109\-0.045473\0.998965\0.000763
> 
> 0028,0030  Pixel Spacing: 0.468749\0.468756
> 
> And the VTK world coordinates generated are (x, y, z)
> -2.23475 6.95207 17.536
> 0.190571 5.62917 17.536
> 
> How can I convert/transform these coordinates into 3D DICOM 
> coordinates?
> 
> 
> Thanks a lot guys,
> Eric 
> 
> 
> 
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> tes-to-3D-DICOM-coordinate-tp5720854.html
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