Filtration provides benefits to the patient and radiographic quality. Which statement is true?

• A. Reduces the patient's skin dose and improves image quality
• B. Increases scatter and reduces image contrast
• C. Has no effect on dose
• D. Shortens processing time

Answer: (A)

Filtration removes the low-energy photons from the x‑ray beam that would be absorbed by superficial tissues and contribute to skin dose without helping form the image. By eliminating these photons, the beam becomes harder, so the patient receives less skin dose while the photons that do reach the detector are more penetrating. This often leads to clearer, more reliable image quality for the same exposure. Filtration does not increase scatter or shorten processing time, and it clearly affects dose, so the statement that it reduces skin dose and improves image quality is the best description.