CAT stands for "computerized axial tomography." Translated, that means a scanner takes computer pictures of what's going on inside your body. The scan itself is painless. All you'll need to do is hold still for a few minutes at a time so the pictures come out clear.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2015 The Nemours Foundation/KidsHealth. All rights reserved.