A computed tomography (CT) scan allows one to view the internal organs of the body without overlap.  This is similar to looking at the growth rings on a crosscut tree trunk.  You will lie on a table that slides through a "donut" shaped machine.

For some exams, breathing instructions will be given over an intercom.  For abdominal and pelvic scans, you will be required to drink a mixture of x-ray contrast and juice.  A contrast medium may also be injected into a vein of your arm to show blood vessels.  Most of the CT examinations are completed in 30 minutes or less.  During the exam, cross-sectional images are produced for reading by the radiologists.