What is the depth of Dmax for a kilovoltage beam in a 10x10 cm field?

In radiation therapy, Dmax refers to the depth at which the dose delivered by the radiation beam is at its maximum. For kilovoltage (kV) X-ray beams, the Dmax is typically found at or very near the surface of the skin. In a 10x10 cm field with a kilovoltage beam, the maximum dose often occurs directly at the skin surface or very close to it, which is why the depth of Dmax would be considered effectively at 0.0 cm.

This characteristic of Dmax in kilovoltage beams is significant because it impacts treatment planning and patient safety. In contrast, megavoltage (MV) beams exhibit a Dmax that is typically deeper, due to their higher energies allowing for greater penetration into tissue. Understanding the Dmax depth for different energies is crucial for effective dose delivery and ensuring that the target area receives the appropriate radiation while minimizing exposure to surrounding healthy tissues.