get common smallest extent

[jakubMitura14]

I have 3 MRI images t2w adc and hbv and labels associated with t2w
I am registering adc and hbv to t2w in order to avoid moving the label (although I know it can be done through transformix)

However I would like to put all onto the same grid - so have the images registered and represented with arrays of the same dimensions (extent) - size of smallest view (I know that I only care about part that can be seen on all images so I want only common part) - How can I achieve it ?