Which option would NOT reduce patient exposure?

Which option would NOT reduce patient exposure?

• A. Increased Filtration
• B. Short SID
• C. Collimation
• D. Higher kVp

Answer: (B)

The concept tested is how to lower patient dose in radiography. Increasing filtration removes low-energy photons that would be absorbed by the patient without improving image quality, so the dose to the patient decreases. Collimation confines the beam to the area of interest, reducing the irradiated tissue and thereby lowering dose. Higher kVp allows using a lower mA or shorter exposure time to achieve the same receptor exposure, which also reduces patient dose, though it can affect image contrast if not adjusted properly. A shorter SID, however, brings the x-ray source closer to the patient, increasing beam intensity at the patient due to the inverse square law, which would raise exposure instead of reducing it. So the option that would not reduce patient exposure is the short SID.

The concept tested is how to lower patient dose in radiography. Increasing filtration removes low-energy photons that would be absorbed by the patient without improving image quality, so the dose to the patient decreases. Collimation confines the beam to the area of interest, reducing the irradiated tissue and thereby lowering dose. Higher kVp allows using a lower mA or shorter exposure time to achieve the same receptor exposure, which also reduces patient dose, though it can affect image contrast if not adjusted properly. A shorter SID, however, brings the x-ray source closer to the patient, increasing beam intensity at the patient due to the inverse square law, which would raise exposure instead of reducing it. So the option that would not reduce patient exposure is the short SID.