To reduce patient and operator dose while maintaining image quality, which combination is recommended?

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

Answer: (A)

Reducing dose while preserving diagnostic image quality comes from combining approaches that cut exposure and limit unwanted radiation, without compromising the information the image must convey. The strongest pairing is to optimize how the exposure is generated and to tightly control the beam’s range and interaction with the patient.

Using optimization of exposure factors means setting the exposure so you get enough receptor signal with the smallest reasonable dose. This includes employing automatic exposure control or carefully chosen kVp and mAs, along with proper filtration, so the image remains adequate in brightness and contrast even as the dose goes down. Pairing that with beam restriction—collimation to the exact area of interest and the use of shielding to protect adjacent tissues—reduces the amount of tissue irradiated and minimizes scatter. Fewer scatter photons reaching the operator means lower operator dose, and less irradiated tissue means lower patient dose, all while the image quality stays sufficient for diagnosis.

In short, the best approach is to combine exposure optimization with strict field control and shielding. This dual strategy addresses both sides of dose reduction and maintains image quality.