Computed Tomography,  Head

 

Computed axial tomography (CAT), computer-assisted tomography, computed tomography, CT, or body section roentgenography is the process of using digital processing to generate a three-dimensional image of the internals of an object from a large series of two-dimensional x-ray images taken around a single axis of rotation. CT is used in medicine as a diagnostic tool and as a guide for interventional procedures. Sometimes contrast materials such as barium (administered orally or rectally) or intravenous iodinated contrast are used. 
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