A shielding component that uses lead to attenuate scatter is typically integrated into which part of the radiographic system?

• A. Imaging receptor tray
• B. Anode housing
• C. X-ray tube window
• D. Collimator leaves

Answer: (D)

The key idea here is beam shaping and scatter control. The component that uses lead to attenuate scatter is the collimator leaves. The collimator is mounted on the X-ray tube and its adjustable leaves are lined with lead. As you set the field size, these leaves define the precise X-ray beam that reaches the patient. By absorbing photons that would otherwise escape outside the intended field or scatter within the patient, the collimator minimizes stray radiation and reduces the amount of scatter that can reach the image receptor, improving image contrast and helping protect the patient from unnecessary exposure.

The other parts don’t provide this kind of scatter shielding. The imaging receptor tray simply holds the receptor; the X-ray tube window is a thin barrier designed to let X-rays through, not to shield against scatter; and the anode housing mainly provides structural shielding against leakage around the tube, not the targeted scatter control achieved by the collimator leaves.