Which of the following is used in shaping the field of an electron beam treatment?

Question

Quizplus · Accepted Answer

Electron shielding differs considerably from photon beam treatment.Attenuated much more efficiently, full shielding for electron beams requires lead thicknesses of only several millimeters (general rule: $\frac{1}{2}$ energy in millimeters of lead).Field-defining apertures or "cutouts" can be designed to fit directly inside the electron cone.After completion of a template of the defined treatment area, a model for creation of a Cerrobend cutout is made.

Which of the Following Is Used in Shaping the Field