Brain in head. False-colour three-dimensional computed tomography (CT) scan of the human brain seen within the head, in side view. Layers of the head are stripped away to show internal anatomy. At centre left, the nose and mouth of the face are seen in profile. Deeper to this are contours of the skull showing bones of the orbit and jaw region. At top, convolutions of the cerebrum of the brain are seen inside the skull. CT scanning combines the use of a computer and X-rays passed through the body to produce cross-sectional images of body tissue. Here, data from multiple slices" through skin, skull and brain have been combined to form this three-dimensional view."