For example, a mammogram can detect breast cancer long before it can be felt during a physical exam. This early detection of the tumor can save lives. There are many state and federal regulations limiting the total radiation dose that may be received by people working with radiation. To comply with those regulations, the technologist must follow strict precautions to keep their cumulative exposure to a minimum. Although no adverse health effects have been directly linked to low-dose radiation exposure, the medical community is playing it safe with regards to radiation.
Most physicians are very careful about ordering radiologic tests.
They should not order a study unless it will improve patient care. If you have a question about the importance or the necessity of a radiologic test that has been ordered for you, be sure to ask your physician.