What type of detectors are required for K-Edge filtration?

• A. Standard film-based detectors
• B. Energy discriminating detectors
• C. Photographic detectors
• D. Charge-coupled device (CCD) detectors

Answer: (B)

K-Edge filtration is a technique that utilizes the sharp increase in absorption of a specific energy level of X-rays by certain materials, usually used to enhance contrast in imaging. Energy discriminating detectors are uniquely suited for this purpose because they can differentiate between photons of different energies. This capability allows them to effectively utilize the K-edge phenomenon by selectively filtering out lower energy X-rays while allowing higher-energy X-rays that are essential for providing clearer and more accurate images of bone density.

These detectors can precisely measure the energy of incoming X-ray photons and discard those that fall below a defined energy threshold, which enhances image quality and reduces patient exposure to unnecessary radiation. Their design focuses on capturing the specific energy spectrum that contributes to K-edge filtration, making them ideal for use in applications like bone densitometry, where precise measurements of mineral density are crucial.