Which of the following factors influence patient rad dose?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2, & 3

Answer: (D)

Radiation dose to the patient is shaped by a combination of technique, the patient’s own characteristics, and how the beam is limited and guided. Technique controls how many photons are produced and how penetrating they are; increasing exposure factors generally raises dose, while optimizing kVp and filtration can sometimes maintain image quality with less dose. Patient factors—such as size, body habitus, and tissue density—affect how much the X-ray is attenuated, so larger or denser patients typically require higher technique to get a usable image, which increases dose. Beam management, including proper collimation, shielding, and correct alignment, directly reduces exposed tissue and thus lowers dose while focusing the image on the region of interest.

Because each of these domains can raise or lower the dose, all three factors collectively influence patient radiation dose. If any one were ignored, you wouldn’t have the full picture of how dose is controlled in practice.