Developing a novel dosimeter system used in radiotherapy


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Şenyiğit M., Yavuzkanat N.

XV. International Conference on Nuclear Structure Properties, Kırıkkale, Türkiye, 28 - 30 Haziran 2022

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Kırıkkale
  • Basıldığı Ülke: Türkiye
  • Ankara Üniversitesi Adresli: Evet

Özet

Nowadays, using novel radiotherapy treatment techniques such as IMRT, radiosurgery, brachytherapy, IORT, and MRI-linac cause difficulties in measuring the dose accumulated in the patient during treatment. Therefore, it would need to develop new dosimetry systems that are accurate, easy to use, compact, and capable of real-time in vivo monitoring. Scintillation materials are one of the best alternatives to real-time dosimetry systems, which are more sensitive and provide better spatial resolution than the ion chamber. Since organic plastic scintillators are water and tissue-equivalent and can be produced in small sizes, they are widely used in radiotherapy. Non-water-equivalent inorganic scintillators have promise in RT due to high light output, measuring dose even at lower energy radiation, and overwhelming signal intensity compared with the Cherenkov effect. In this study, the dosimeter system using new-generation inorganic scintillation materials was modeled in Geant4 simulation. The dose values were obtained by sending the photon energy distribution of Varian brand Linac in the range of 6-25 MV to the water phantom. The results for various inorganic scintillators were compared with the water to find out the correction factor.