Which X-ray examination does not expose the patients to unnecessary radiation?

The chest examination of workers in contact with beryllium is designed to monitor specific occupational exposures and conditions related to the harmful effects of beryllium, such as lung disease. These examinations are generally performed when there is a clear medical or occupational reason to assess the health of the workers. Therefore, the radiation exposure from this examination is justified and necessary to safeguard the health of individuals who have a known risk due to their work environment.

In contrast, routine check-up X-rays, screening for dental issues, and whole-body CT scans often involve exposure to radiation without a corresponding medical necessity. Routine check-ups may lead to over-utilization and unnecessary exposure, as they do not always provide diagnostic benefits unless there are specific indications for the imaging. Screening for dental issues, while important, may also result in unnecessary treatments or follow-ups if not warranted. Whole-body CT scans expose patients to significant radiation for potentially minimal clinical benefit, making them less ideal when compared to targeted imaging studies like the chest examination mentioned.