Expanding volume without squeezing others

[lassoan (Andras Lasso)]

You need to resample the volumes to have the same geometry (origin, spacing, axis directions - using “Crop volume” module or one of the image resample modules) then add them (using “Add scalar volume” module or using numpy array operations). See more details in these posts:

• Landmark registration and combining intenstities of fixed and moving volume
• Is it possible to view more than two image volumes at the same time in slice viewers?