An increase in mA will affect which film-screen radiographic quality?

An increase in mA will affect which film-screen radiographic quality?

• A. Contrast
• B. Density
• C. Sharpness
• D. Noise

Answer: (B)

Increasing mA raises the number of x-ray photons produced, which increases receptor exposure and darkening of the film—this is called density. So higher mA leads to greater density. Contrast is mainly controlled by kVp and filtration, not the number of photons, and sharpness depends on geometric factors like focal spot size and motion, not exposure level. Noise (quantum mottle) can improve with more photons, but the primary radiographic quality affected by increasing mA is density.

Increasing mA raises the number of x-ray photons produced, which increases receptor exposure and darkening of the film—this is called density. So higher mA leads to greater density. Contrast is mainly controlled by kVp and filtration, not the number of photons, and sharpness depends on geometric factors like focal spot size and motion, not exposure level. Noise (quantum mottle) can improve with more photons, but the primary radiographic quality affected by increasing mA is density.