How to add .raw images?

I have four .raw 3D images (resolution 200*200*200). All of these images has same characteristics (same dims, same voxel spacing etc.), how can I do this in matlab?

Answer 1

[Image Analyst]

Try adding, just be sure to cast to double so as to not clip the values if they're uint8 or uint16:

sumImage = double(image1) + double(image2) + double(image3) + double(image4)