title: A therapy beam training aid.
abstract: Beams of X-rays and electrons used in external beam radiotherapy are characterized by differences in penetration, build-up, divergence, scatter etc. This short communication describes a very simple phosphor-loaded box that can be used to demonstrate directly to students the different properties of beams and the effect of field modifiers such as wedge filters, lead shields etc.
authors.affiliation: Department of Medical Physics and Clinical Engineering, Singleton Hospital, Swansea NHS Trust, UK.
authors.forename: A W
authors.initials: AW
authors.lastname: Seaby
authors.forename: C
authors.initials: C
authors.lastname: Cravan
mesh_terms: D018961:Educational Technology; D004867:Equipment Design; D006801:Humans; D011871:Radiology / Q000193:education*; D011878:Radiotherapy