Dosimetry for irregular shaped fields of beta rays.
The feasibility of using various shapes and sizes of field limiting devices and collimators with beta-ray eye applicators has necessitated the study of dosimetry for these fields. A method of calculating surface and depth doses for any shaped field from the data for circular fields is presented. The depth dose evaluation is based on a measured dose function which is defined as the dose rate at a particular depth for a particular circular field. The evaluated values for the surface and depth dose were compared with experimentally obtained values for three non-circular fields. The good agreement in these data indicates the practicability of the method suggested.
D011829:Radiation Dosage; D011839:Radiation, Ionizing; D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes
D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes