A clinical electron beam incident on a patient exhibits what?

A clinical electron beam incident on a patient exhibits a spectrum because it consists of electrons that can vary in energy levels. When electrons are accelerated and emitted from a linear accelerator, they do not all possess the same energy; instead, there is a range of energies that make up the beam. This mix of different energy electrons leads to the spectrum, which is essential in therapeutic applications as it allows for a controlled distribution of dose based on the energy levels present.

In clinical settings, knowing that the electron beam has a spectrum is crucial for treatment planning and dose calculations, as different energies can affect tissue response and dose deposition within the patient. Understanding this concept ensures that healthcare professionals can tailor therapies according to the specific needs of the patient and the characteristics of the tumor being treated.