title: Calibration of the 90Sr+90Y ophthalmic and dermatological applicators with an extrapolation ionization minichamber.
abstract: (90)Sr+(90)Y clinical applicators are used for brachytherapy in Brazilian clinics even though they are not manufactured anymore. Such sources must be calibrated periodically, and one of the calibration methods in use is ionometry with extrapolation ionization chambers. (90)Sr+(90)Y clinical applicators were calibrated using an extrapolation minichamber developed at the Calibration Laboratory at IPEN. The obtained results agree satisfactorily with the data provided in calibration certificates of the sources.
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, IPEN/CNEN-SP, Av. Prof. Lineu Prestes, 2242, 05508-000 São Paulo, SP, Brazil. Electronic address: patrilan@ipen.br.
authors.forename: Patrícia L
authors.initials: PL
authors.lastname: Antonio
authors.affiliation: Centro Regional de Ciências Nucleares, Comissão Nacional de Energia Nuclear, CRCN/CNEN, Av. Prof. Luis Freire, 200, 50740-540 Recife, PE, Brazil.
authors.forename: Mércia L
authors.initials: ML
authors.lastname: Oliveira
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, IPEN/CNEN-SP, Av. Prof. Lineu Prestes, 2242, 05508-000 São Paulo, SP, Brazil.
authors.forename: Linda V E
authors.initials: LV
authors.lastname: Caldas
mesh_terms: D001610:Beta Particles / Q000627:therapeutic use; D001918:Brachytherapy / Q000295:instrumentation* / Q000592:standards*; D001938:Brazil; D002138:Calibration / Q000592:standards; D005128:Eye Diseases / Q000532:radiotherapy; D006801:Humans; D011874:Radiometry / Q000295:instrumentation* / Q000592:standards*; D011879:Radiotherapy Dosage; D012871:Skin Diseases / Q000532:radiotherapy; D013326:Strontium Radioisotopes / Q000008:administration & dosage* / Q000592:standards / Q000627:therapeutic use; D015021:Yttrium Radioisotopes / Q000008:administration & dosage* / Q000592:standards / Q000627:therapeutic use
chemical_list: D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes
keywords: (90)Sr+(90)Y clinical applicators; Beta radiation; Extrapolation chamber