What is the difference between a cat scan and a ct scan?
They are the same thing. CAT stands for Computerized Axial Tomography which was later changer to just CT or rather Computerized Tomography. The scanners originaly only did axial images (referring to the plane of the image) but later became able to do other planes such as coronal or saggital imaging and can now do anything with the block of information it collects.