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, 1x1x1mm3 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 photon component of the emission on the results was analysed. The method has overall combined uncertainty + or -6% which is comparable, and slightly better, than other recent dosimetric methods.
Kovacević
Nenad
N
Clinic of Oncology, University Hospital Centre Rebro, Kispatićeva 12, 10000 Zagreb, Croatia.
Vrtar
Mladen
M
Vekić
Branko
B
D002138:Calibration; D005134:Eye Neoplasms / Q000532:radiotherapy*; D006801:Humans; D008545:Melanoma / Q000532:radiotherapy*; D011874:Radiometry / Q000379:methods; D011878:Radiotherapy / Q000295:instrumentation; D012238:Rhodium / Q000627:therapeutic use*; D012428:Ruthenium / Q000627:therapeutic use*
D012428:Ruthenium; D012238:Rhodium