CAT stands for computer axial tomography. It is a highly specialized, computer assisted type of x-ray scanner. The person is placed inside a scanning machine and the x-ray scanner rotates 360 degrees around the person or the specific area being scanned. The results of the scans are then processed by a computer system to produce a 3D image of the scanned area. Importantly, cross-sectional "slices" in a particular area of the body can be viewed for a thorough view in the body. Traditional x-rays merely produce a flat image with no depth. Another advantage of a CAT scanner is that it has a much higher visual resolution and can differentiate between different types of tissues in the body based on their abilities to block x-ray beams.