CT scans should be handled with care because of the radiation involved. In fact, in many cases they shouldn't be done at all - especially full-body scans on apparently healthy people with no indicators of health problems.
High Numbers of Patients Injured by Medical Mistakes
The data about the frequency of medical errors keeps accumulating. One recent study found that one out of every three people admitted to hospitals sustains injuries from factors unrelated to the condition for which the patient was hospitalized.