Short Distance X-ray Therapy with Standard Apparatus: Physical Factors

Simple modifications of standard X-ray apparatus are described for carrying out short distance “contact” therapy. For work requiring somewhat higher penetrations, a number of “middle distance” small field applicators for use on standard 200 kV therapy tubes are described. Radiation output, quality and depth dose measurements on the beams so produced have been made. Modifications of the “middle distance” applicators for intra-buccal treatments are described.