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

How to extract x,y,z coordinates from 3D Dicom Images? can any one share me idea's ?

[tesarj13]

Which coordinates?

[voxey]

i have DICOM 3D image , how can extract 3D Coordinate from image?

[KSSV]

When you read the image..you have pixles in hand...you can associate coordinate with it if you have or the the coordinates would be the indices/ dimension of the image. YOu can use find for example to extract the color you want, which gives you (x,y,z).

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/428899-how-to-create-x-y-z-input-of-delaunaytriangulation-x-y-z-from-jpeg-dicom-images is our existing discussion of this . we cannot answer the question until you can tell us which kind of medical image is being used

[voxey]

DICOM Image MRI ,CT Images Walter Roberson?

Answer 1

[Walter Roberson]

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 .

Answer 2

[drummer]

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