Increasing filtration thickness affects the quantity of the X-ray beam in what way?

Increasing filtration thickness affects the quantity of the X-ray beam in what way?

• A. Increased quantity
• B. Decreased quantity
• C. No change in quantity
• D. Increased quality

Answer: (B)

Increasing filtration thickness reduces the number of X-ray photons that reach the image receptor. Filtration absorbs photons, especially the softer, low-energy ones that contribute less to image formation, so as thickness goes up, more photons are removed before exiting the tube. That drop in transmitted photons means a lower beam quantity (intensity). At the same time, the beam becomes “harder” on average because the remaining photons are higher energy, which increases beam quality. So, while thicker filtration improves quality, it decreases the quantity.

Increasing filtration thickness reduces the number of X-ray photons that reach the image receptor. Filtration absorbs photons, especially the softer, low-energy ones that contribute less to image formation, so as thickness goes up, more photons are removed before exiting the tube. That drop in transmitted photons means a lower beam quantity (intensity). At the same time, the beam becomes “harder” on average because the remaining photons are higher energy, which increases beam quality. So, while thicker filtration improves quality, it decreases the quantity.