How does a CT scan work?

How does a CT scan work?

Kenneth W. Chin (M.D., F.A.C.R.) gives expert video advice on: What is a CT scan used for?; Does the radiation involved with CT scans pose a health risk?; Is a CT scan done differently on children? and more...

A CT scan works on the basis of passing an X-ray beam through the body in multiple directions. So when the CT scanning tube spins 360° around the body It's acquiring information throughout that spin. When that information is then acquired, then the information is reconstructed in a 3-dimentional fashion so that all the pieces of information that are acquired are then put together and create pictures where we can see the body as slices.