Dosimetry of spherical Sr-90-Y-90 beta ray eye applicators.
A modification of the conventional extrapolation chamber to perform absolute dose measurements from surfaces of spherical beta applicators (type SIA.I, SIA.3, SIA.6) is described. A stack of Ilford N 550 films has been used in a spherical geometry to obtain the variation of surface dose, the depth dose data and the isodose curves. The results obtained are compared with data available in the literature.
D005128:Eye Diseases / Q000532:radiotherapy*; D006801:Humans; D008722:Methods; D011829:Radiation Dosage; D011868:Radioisotopes / Q000627:therapeutic use*; D011874:Radiometry / Q000379:methods*; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D013326:Strontium Radioisotopes / Q000627:therapeutic use*; D015020:Yttrium Isotopes / Q000627:therapeutic use*
D011868:Radioisotopes; D013326:Strontium Radioisotopes; D015020:Yttrium Isotopes