What are the advantages and disadvantages of sheetfed scanner?

CT scanning allows you to gain a very good picture of what is going on inside the patient's body.

There is a minor issue of radiation exposure, however the dose is very small and you certainly get more radiation from the sun than from a CT.

The limitation is the attenuation coefficient of the rays used to assemble the image, in some cases an MRI may give a clearer picture. A PET scan may also be considered.

Nowadays, most CT's are coupled with PET scans, and the only pure CT's are DEXA's used to calculate bone density.