A TABLE OF PHANTOM SCATTER FACTORS OF PHOTON BEAMS AS A FUNCTION OF THE QUALITY INDEX AND FIELD SIZE

Phantom scatter factors, for square fields of various sizes, have been determined at a fixed reference depth of 10 cm, separately in differe nt institutes, for a large number of linear accelerators under the aus pices of the Netherlands Commission on Radiation Dosimetry. The method used for these measurements has been described in a previous paper. T he present article describes the conversion of the measured values int o a comprehensive and consistent data set, that gives the phantom scat ter factor as a function of field size (from 4 cm up to 40 cm) and qua lity index (from 0.600 up to 0.800).