Increased skin doses may be seen on patients caused by the interaction of the photon beam with material used in beam-shaping or modifying devices.Therefore, to prevent electron contamination, all devices must be secured at a minimum of ______ cm from the surface of the patient.

Question

Quizplus · Accepted Answer

Low-energy electrons are absorbed in 15 cm of air; therefore, all beam-shaping and modification devices for photon beams must be secured at a minimum of 20 cm from the surface of the patient.

Increased Skin Doses May Be Seen on Patients Caused by the Interaction