Which action is not a standard method to minimize patient dose while preserving image quality?

• A. Increasing field size to include more anatomy
• B. Collimation to the area of interest
• C. Grids when needed
• D. Increasing distance from tube to patient when feasible

Answer: (A)

The main idea here is to minimize the patient’s radiation exposure while still getting a diagnostic image by restricting the beam to only what’s needed and using geometry and technique to control scatter and quality.

Increasing the field size to include more anatomy is not a standard dose-minimization practice because irradiating a larger area means more tissue is exposed and more scatter is produced. That directly increases overall patient dose and can degrade image efficiency, making it harder to optimize quality for the area of interest.

The other actions align with reducing dose while preserving or even improving image quality: collimating the beam to the area of interest limits irradiation to essential tissue and reduces scatter; using grids when scatter would compromise image quality helps maintain contrast, though it may require a higher exposure to compensate; increasing distance from the X-ray tube to the patient lowers dose according to the inverse square law, as long as image quality remains acceptable.