Computed tomography – more commonly referred to as CT, CT scan or CAT scan – uses x-rays and advanced computer technology to generate detailed cross-sectional, and if needed, three-dimensional views of the body’s internal organs and body structures. CT scans are used to identify normal and abnormal body structures, as well as guide procedures. The exam is painless. http://medcrossimagingllc.com/what-is-a-ct-or-cat-scan/