title: Simple computer method for equivalent square therapy field determination.
abstract: A simple BASIC computer program allows rapid determination of the equivalent squares of irregular radiation therapy fields. A port film or scale drawing of the irregular field is outlined manually on a spark tablet digitizer, and the side length of the square of equivalent area to perimeter ratio is rapidly calculated and returned by the computer.
mesh_terms: D003201:Computers; D006801:Humans; D008433:Mathematics; D011878:Radiotherapy / Q000379:methods*; D011879:Radiotherapy Dosage