Naslov
Calibration of p-type silicon diode for in-vivo dosimetry in Co-60 beams

Autori
Mrčela, Iva ; Bokulić, Tomislav ; Budanec, Mirjana ; Kusić, Zvonko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the Sixth Symposium of the Croatian Radiation Protection Association / Garaj-Vrhovac, Verica ; Kopjar, Nevenka ; Miljanić, Saveta - Zagreb, 2005, 300-305

Skup
6th Symposium of the Croatian Radiation Protection Association

Mjesto i datum
Stubičke Toplice, Hrvatska, 18.04.2005. - 20.04.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
in-vivo dosimetry; radiotherapy; diode

Sažetak
Calibration of semiconductor detectors for entrance dose measurements was performed in order to implement in-vivo dosimetry as a part of a quality assurance programme for external beam radiotherapy in our department. The DPD-3 Scanditronix basic unit and p-type silicon diodes EDE-5, designed for Co-60 beams and calibrated Farmer type ionisation chambers connected to a PTW Unidos electrometer were used. Entrance dose calibration factors were determined as a ratio of diode signal measured at phantom surface and ionisation chamber signal, measured at depth of maximum dose in a polystyrene phantom. Different correction factors for various source to surface distances, collimator openings, beam directions or gantry angles and presence of wedges and trays in beam set up were evaluated. Set of measurements on polystyrene and Alderson Rando phantom were performed in order to compare expected doses calculated using Theraplan Plus 1000 computer treatment planning system to the measured doses.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kliničke medicinske znanosti

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