Computerized axial tomography (CAT):

CAT scan of the human head. Image courtesy of Andrew Ciscel.

CAT scan of the human head. Image courtesy of Andrew Ciscel.

usually referred to as a CAT or CT scan, computerized axial tomography uses x-ray technology to produce three-dimensional images of bodily structures. This can provide structural information about the brain, although it is of a lower resolution than magnetic resonance imaging (MRI).