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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:30 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Biophysics; Medical Physics
Title:
The effect of ionizing radiation. calibration of dosimetric apparatus used in radiology
Authors:
Mihaela DUMITRACHE (1,2), Mirabela DUMITRACHE(1,2), Daniela STROE(2), Claudia G. CHILOM(1), Catalin VANCEA(3), Ion CALINA(1,3), Eugenia BĂDIŢĂ(3)
Affiliation:
1) University of Bucharest, Faculty of Physics, Bucharest, Romania
2) Clinical Hospital "COLTEA", Department of Radiation Oncology, Bucharest, Romania
3) National Institute for Laser, Plasma and Radiation Physics - INFLPR, Bucharest, Romania
E-mail
mihaela.dumitrache07@gmail.com
Keywords:
ionization chambers, medical accelerator, calibration method
Abstract:
This work presents the results obtained in the calibration factors for cylindrical and parallel ionization chambers in radiation beams used by Primus Mevatron medical linear accelerator. This medical accelerator belongs to the Clinical Hospital "Coltea", Department of Radiation Oncology, Bucharest, Romania. The calibration method is according to IAEA TRS-398 reference standard. The ionization chambers used as reference calibration are calibrated with UNIDOS dosimeter in beam of 60Co at the primary standard PTB - Braunschweigh (German Federal Institute of Physics and Metrology). For each measured value, the uncertainty was taken into consideration and then evaluated. After the next step of the irradiation, the ionization chamber will detect radiation and will send the information to the dosimeter. The absorbed dose in water is determined by the photon beam quality, TPR20,10 (report phantom tissue) or electron beam quality, R50.
Acknowledgement:
This work was supported by Clinical Hospital "COLTEA", Department of Radiation Oncology, Bucharest, Romania, and Secondary Standard Dosimetry Laboratory at High Energies -STARDOOR of the National Institute for Laser, Plasma and Radiation Physics - INFLPR, Bucharest, Romania.
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