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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:21 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Nuclear and Elementary Particles Physics II
Title:
LONG TERM STABILITY OF CLINICAL LINIAR ACCELERATOR PERFORMANCE. Z-SCORE ASSESEMENT FOR ABSORBED DOSE TO WATER QUANTITY
Authors:
Eugenia Simona BADITA (1), Catalin VANCEA (1, 3), Ion CALINA (1, 3) Daniela STROE (2), Mihaela DUMITRACHE (2, 3), Elena STANCU (1, 3), Anca SCARISOREANU (1), Florea SCARLAT (1)
Affiliation:
1) National Institute for Laser, Plasma and Radiation Physics – INFLPR, Bucharest-Magurele, Romania
2) Clinical Hospital "Coltea", Radiotherapy Department, Bucharest, Romania
3) Bucharest University, Physics Department, Bucharest-Magurele, Romania
E-mail
eugenia_badita@yahoo.com
Keywords:
absorbed dose to water, z-score, radiation therapy dosimetry
Abstract:
This paper presents the results obtained of the measured absorbed dose to water in high energy photon and electron beams provided by linear accelerator in the clinical dosimetry laboratory of radiotherapy department. The absorbed dose to water was measured according to IAEA-398 standard. For measurements were used water proofing ionization chambers. The measurements were performed in water equivalent phantom in reference point for 10 cm x 10 cm field size at SSD = 1 m. For each ionization chamber were used reference point determined according to the radiation beam quality used. The measurements were performed in the photon beam reference point 5 cm. For electron beams the reference point was determining according to electron beam quality (R50). For each measured value were considered influence quantities and was evaluated measurement uncertainty.
References:
1. IAEA TRS-398 Absorbed dose determination in external beam radiotherapy: An international Code of Practice for dosimetry based on standards of absorbed dose to water;
2. ISO 13528:2005 Statistical methods for use in proficiency testing by interlaboratory comparisons
3. Anca Scarisoreanu, Ralf Peter Kapsch, Eugenia Simona Badita, Maria Dumitrascu, Catalin Vancea, Elena Stancu: Bilateral comparison between SSDL STARDOOR and PTB for absorbed dose to water quantity, PT-2013, Brasov, Romania, p 80-83.
4. Stancu E.; Vancea C.; Valenta J.; Zeman J.; Badita E.; Scarisoreanu A.; "Assessment of absorbed dose to water in high energy photon beams using different cylindrical chambers"; Romanian Reports in Physics, vol. 67, No. 2, 2015;
5. E. Stancu, C. Vancea, J. Valenta, J. Zeman, E. Badita, A.Scarisoreanu, "Absorbed dose to water measurements in high energy electron beams using different plane parallel chambers"; Romanian Reports in Physics, vol. 67, No. 3, 2015.
Acknowledgement:
Clinical Hospital "Coltea", Radiotherapy Department, Bucharest, Romania
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