engleski

A simple calibration method for 106Ru-106Rh eye applicators

Ru-Rh eye applicators are used for the radiotherapy of eye malignancies such as melanomas. We present a method of dosimetry of these beta particle emitting applicators. Method is based on a Plexiglas phantom (constructed for this purpose) containing spherical shells and very small, 1 x 1 1 mm3 thermoluminescent dosimeters (TLD) as dosimeters. We determined 3-D depth doses and interpolated depth dose functions. Surface dose rate inhomogeneities and the consequences were considered and discussed. A possible influence of phantom component of the emission on the results was analysed. The method has overal combined uncertainty +-6% which is comparable, and slightly better, than other recent dosimetric methods.

106Ru-106Rh ophthalmic applicators; Thermoluminescent dosimeters (TLD); Choroidal melanoma; Beta dosimetry

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