Which one of the following factors is NOT relevant to the percent depth dose function?

Question

Quizplus · Accepted Answer

The percent depth dose function is primarily concerned with how the dose of radiation decreases as it penetrates deeper into a medium. It is influenced by the beam size, beam energy, and the depth within the phantom (or patient), but not directly by the tissue to air ratio. The tissue to air ratio is a separate concept used in dosimetry to compare the dose in tissue to that in air, and does not directly affect the percent depth dose function.

Which One of the Following Factors Is NOT Relevant to the Percent