Russian Federation
Accurate determination of the absorbed dose in biological tissue or in water used as its equivalent is a prerequisite for radiation therapy (remote or brachotherapy) using low-energy gamma sources or X-rays. The article describes the research results of the developed extrapolation ionization chamber with a thin entrance window mounted in a solid-state phantom
extrapolation ionization chamber, absorbed dose, X-ray radiation, phantom
1. ICRU – Report 14 Radiation Dosimetry: H-Rays and Gamma Rays with Maximum Photon Energies Between 0,6–50 MeV.
2. RD 50-691-89. Pogloschennye dozy fotonnogo (1–50 MeV) i elektronnogo (5–50 MeV) izlucheniy v luchevoy terapii. Metody opredeleniya. M., 1990.
3. IPEMB Code of Practice for the determination of absorbed dose for X-rays below 300 kV generation potential (0,035 mm Al – 4 mm Cu HVL; 10–300 kV generation potential), Phys. Med. Biol. 41, 1996.
4. Berlyand A.V. Gosudarstvennyy pervichnyy etalon edinic pogloschennoy dozy i moschnosti pogloschennoy dozy fotonnogo, elektronnogo, protonnogo izlucheniy i v puchkah ionov ugleroda, kolichestva, flyuensa, plotnosti potoka i energii chastic v puchkah protonov i tyazhelyh zaryazhennyh chastic GET 38-2024//Izmeritel'naya tehnika. 2024. № 73(9). S. 12-18.
5. Berlyand A.V., Berlyand V.A. Vosproizvedenie moschnosti pogloschennoy dozy fotonnogo izlucheniya v grafite s pomosch'yu grafitovoy ekstrapolyacionnoy kamery v grafitovom fantome//ANRI. 2014. № 1(76). S. 56-59.
6. Absorbed dose determination in external beam radiotherapy. An international code of practice for dosimetry based on standards of absorbed dose to water. Techical reports series № 398. IAEA, Vienna 2024.
7. U. Chica, M. Anguiano, A.M. Lallena, «Study of the formalism used to determine the absorbed dose for low-energy H-ray beams», Phys. Med. Biol., no. 53. pp. 6963-6977, 2008.
8. H.-J. Selbach, H.-M. Kramer, W.S. Culberson. «Realization of reference air-kerma rate for low-energy photon sources», Metrologia, no. 45, pp. 422-428, 2008.
9. T. Schneider, B. Lange, H.-J. Selbach, «Towards a determination of the absorbed dose to water in water for low-energy photon-emitting brachytherapy seeds», Metrologia, no. 44, pp. 407-414, 2007.
10. Berlyand A.V., Berlyand V.A. Metodicheskoe obespechenie dozimetrii dlya celey luchevoy terapii// Al'manah sovremennoy metrologii. 2019. № 3(19). S. 54-57.
