Which practice best reduces patient exposure while maintaining image quality?

• A. Use proper collimation and shielding
• B. Increase beam energy
• C. Delay image capture
• D. Rely on automatic exposure control only

Answer: (A)

Limiting the radiation field and protecting sensitive tissues is the most effective way to lower patient dose while keeping diagnostic image quality intact. Proper collimation confines the x-ray beam to the area of interest, which reduces the volume of tissue irradiated and minimizes scattered radiation that can degrade image contrast. When shielding is used appropriately, exposed organs such as the gonads and thyroid receive less dose without affecting the part of interest being imaged.

Increasing beam energy can reduce contrast and may require compensating exposure changes that don’t guarantee a lower patient dose. Delaying image capture doesn’t influence how much radiation reaches the patient. Relying on automatic exposure control alone can help with reproducibility but won’t inherently optimize dose and image quality if technique and positioning aren’t appropriate.