(a)[5]
Describe the fundamental principles behind CT scanning (computed tomography).
(b(i))[1]
By reference to your answer in (a), suggest why CT scanning could not be done before fast computers with large memories were available.
(b(ii))[1]
By reference to your answer in (a), suggest why the radiation dose from a CT scan is much greater than that from an X-ray image of a leg bone.