- (I)X-rays are a form of ionising radiation and as such can be dangerous. (II) How can you find out what is going on inside a person's body without opening the patient up? (III) Doctors use X rays to study and diagnose diseases and injuries within the body. (IV) Nonetheless, X rays can only locate foreign objects inside the body or take pictures of some internal organs. (V) CAT scanners, a special X-ray machine, however, can give a three- dimensional view of all the organs.
I
II
III
IV
V