DefinitionA cranial computed tomography (CT) scan is an imaging method that uses x-rays to create cross-sectional pictures of the head, including the skull, brain, eye sockets, and sinuses.See: Computed tomographyAlternative NamesBrain CT; Head CT; CT scan - skull; CT scan - head; CT scan - orbits; CT scan - sinusesHow the test is performedYou will be asked to lie on a narrow table that slides into the center of the CT scanner. Depending on the study being done, you may need to lie on your stomach, back, or side.A cranial CT scan produces images from your upper neck to the top of your head.You must be still during the exam, because movement causes blurred images. If you can't stay still, pillows or cushions may be placed around your head to hold it in place.Once inside the scanner, the mac