What is the typical surface dose percentage for clean clinical photon beams?

For clean clinical photon beams, the typical surface dose percentage is generally in the range of 10% to 50%. This range reflects the interaction of the photon beams with the tissue at the surface level, where the majority of the dose is delivered due to the energy characteristics of the beams used for radiation therapy.

In clinical practice, photon beams often exhibit lower doses at the surface due to beam energy and tissue attenuation as well as potential scattering effects. As the energy of the beam increases, the surface dose tends to increase, helping to deliver the necessary treatment while considering the safety and effectiveness of the radiation therapy.

The understanding of surface dose is crucial for dosimetrists, as it informs treatment planning and ensures that the prescribed dose is accurately delivered to the tumor while minimizing exposure to surrounding healthy tissue. Knowing the dose at the surface allows for better patient protection and optimization of treatment outcomes.