The radiation dose of DR examination is very small, because the DR examination is a short, instantaneous exposure, the patient receives radiation exposure for a very short period of time, and receives very little radiation dose exposure. According to the statistics of the relevant departments, the dose of X-rays received by chest CT is much larger than that received by DR examination, and the preliminary statistical judgment is that one chest CT is equivalent to 100 DR chest films, so the impact of DR examination on health is minimal, do not worry, please trust the doctor.