The hospital where you're having the CT scan will tell you if there's anything you need to do before it.
see how well a treatment is working, such as checking the size of a tumour during and after cancer treatment.find out if symptoms you've been having are caused by a condition, such as cancer.check your bones or internal organs after an accident.
It's usually used to diagnose conditions or check how well treatment is working. A CT scan is a test that takes detailed pictures of the inside of your body.