dimension images

i can’t upload the segmentation image with the main image any solution please to match the segmentation image with the main image !!!

Hello @safa

The error message in the screenshot clearly identifies the problem:
Image size - 512x512x216
Segmentation size - 256x256x256

The sizes are expected to match.

Is this a segmentation you created or was it done by someone else and given to you? Do the two actually occupy the same spatial region (origin, direction cosine matrix, size*spacing)? If yes, then you can resample the segmentation onto the image and then do the overlay. If not, then you need to identify where was the error introduced.

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You can edit images and segmentations with arbitrary geometry in 3D Slicer. Resampling is performed internally as needed.