How does patient positioning lower unnecessary dose?

• A. Beam not aimed at gonads, patient parallel to cassette and beam, and shielding the abdomen
• B. Beam aimed at gonads
• C. Patient not aligned with cassette
• D. Not shielding the abdomen

Answer: (A)

Positioning lowers unnecessary dose by keeping radiation where it’s needed and protecting parts that aren’t being imaged. When the beam is not directed at the gonads, these highly radiosensitive tissues receive less exposure. Aligning the patient so they are parallel to the cassette and the beam helps ensure the X‑ray travels through the intended area efficiently, which improves image quality without increasing exposure and reduces the chance that a suboptimal position requires a repeat exposure. Shielding the abdomen adds a layer of protection for abdominal organs, absorbing scatter and stray radiation that would otherwise reach non-target tissues. Together, these positioning practices minimize the dose to areas not being imaged while still producing a usable image.