Fix Image Resolutions and number of slices of CT images to fit with pet image

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Hello, I am a total beginner with 3d Slicer so please excuse me and feel free to direct me to the appropriate page if the question is trivial.
I’ve got a Dataset of labeled PET/CT Volumes, where there are Full Body PET and low dose CT Volume and high dose CT Volume of the breast areas which I want to use as training data.

The problem is that the resolution of the PET Data is 200x200x619 and shows the whole body while the resolution of the high-dose CT Data is 512x512x278.

The Volumes are pre-registered by the segmentation author but I need that the resolution of both volumes to be equal.

How can I do this in 3d Slicer and how can I automate it to preprocess the whole dataset.

Thanks for your advice.

Cheers Christoph

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If you didn’t already figure this out, you can use the Resample Image (BRAINS) module for this task.