Final answer:
In the context of reducing patient dose during fluoroscopy, decreasing the SSD will not reduce dose due to the inverse square law, while using 2.5 mm Al filtration and restricting tabletop intensity to less than 10 R/min will reduce the dose. Employing isotopes with short half-lives also helps reduce radiation dose.
Step-by-step explanation:
The question asks which actions will reduce patient dose during fluoroscopy. To protect patients and healthcare professionals from ionizing radiation, a variety of methods are employed, including shielding, increasing the distance from the radiation source, and minimizing exposure time. Specifically, regarding the options provided:
- Decreasing the source-skin distance (SSD) would increase the radiation intensity and patient dose due to the inverse square law, so this option is not correct.
- Using 2.5 mm Al filtration would indeed reduce the patient dose by absorbing lower energy photons that are less penetrating and more likely to contribute to the dose without improving image quality.
- Restricting tabletop intensity to less than 10 R/min would also reduce patient dose by limiting the amount of radiation during fluoroscopy.
Thus, options 2 and 3 are correct measures to reduce patient exposure to radiation.
Additionally, employing isotopes with short half-lives in medical imaging can limit the dose because they decay more quickly, thus reducing the time during which radiation is emitted.