Which of the following techniques is most effective in reducing patient dose during a fluoroscopic examination?

Utilizing last-image hold during a fluoroscopic examination is the most effective technique for reducing patient dose. This method allows the operator to freeze the most recent image displayed and continue reviewing it without the need for continuous X-ray exposure. By holding the last image, the radiation emitted during the examination is significantly reduced, as less fluoroscopy time is required to achieve the necessary diagnostic information.

This is particularly beneficial in procedures where a clear image has already been obtained, as it minimizes unnecessary radiation while allowing clinicians to assess the static image. In contrast, other options, such as increasing the fluoroscopy time or using continuous fluoroscopy, would lead to an increase in radiation dose to the patient, which goes against the principles of radiation protection. Positioning the patient closer to the X-ray source would also increase the patient’s exposure to radiation, making it counterproductive to dose reduction efforts.