How to extract x,y,z coordinates from 3D Dicom Images?

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voxey
voxey 2018-11-12
回答： drummer 2020-1-29
How to extract x,y,z coordinates from 3D Dicom Images? can any one share me idea's ?
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Walter Roberson
Walter Roberson 2018-11-14
https://www.mathworks.com/matlabcentral/answers/399483-reference-to-non-existent-field-pixelspacing
and be sure to follow the references right through to the stackoverflow page as the discussion there has key information about the handling of CT images, which are more complicated to get the position information from .
drummer
drummer 2020-1-29
You can use the function imref3d
https://www.mathworks.com/help/images/ref/imref3d.html
After knowing the world coordinates of your 3-D image, you can you the dicom tag that refers to your pixel dimensions.
info = dicominfo('yourImage.dcm');
vxlDimension = info.PixelSpacing;
vxlThickness = info.SliceThickness;
info.PixelSpacing returns x and y dimensions, so you can you vxlDimension(1) or vxlDimension(2) if they are isotropic voxels.
Cheers

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