It is the duty of the film interpreter to recognize the various discontinuities, their magnitudes, and be capable of relating them to the particular specification required. The responsibility and capability of the radiographic interpreter cannot be overemphasized. Often, many human lives and investments of millions of dollars are depending on the judgement of the radiographic interpreter. It is universally recognized that in the use of such equipment, adequate protection must be provided to personnel. Personnel must keep outside the primary X-ray beam at all times.
Radiation produces changes in all matter that it passes through.
This is also true of living tissue. When a complex organism is exposed to radiation, the degree of damage, if any, depends on which of its body cells have been changed. If the whole body is exposed to a very large dose of radiation, it could result in death. In general, the type and severity of the pathological effects of radiation depend on the amount of radiation received at one time and the percentage of the total body exposed. The smaller doses of radiation may cause blood and intestinal disorders in a short period of time.