Which process is responsible for the majority of energy loss for electron energy ranges useful in radiation therapy?
I.Effective point source method
II.Virtual source method

Question

Quizplus · Accepted Answer

The effective point source is defined "such that the dose varies in accordance with the inverse square law with distance from this source." This method allows for use of an inverse square correction factor along with other factors.In the virtual SSD method, the variation in the inverse square law for small field sizes, low beam energy, and large air gaps is corrected by the factor f_air.

Which Process Is Responsible for the Majority of Energy Loss