Water equivalent radiological properties of Gafchromic external beam therapy and external beam therapy 2 film dosimeters
| Autor: | K. Srinivasan, E James Jabaseelan Samuel |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
film dosimeter
Electron density Range (particle radiation) Film Dosimetry Materials science Dosimeter Radiation Dosimeters Absorption Radiation Water Electrons Radiotherapy Dosage General Medicine Electron lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens lcsh:RC254-282 Oncology Stopping power (particle radiation) Radiology Nuclear Medicine and imaging Mass attenuation coefficient mass attenuation coefficient Atomic physics Effective atomic number water equivalency Beam (structure) |
| Zdroj: | Journal of Cancer Research and Therapeutics, Vol 15, Iss 8, Pp 97-102 (2019) |
| ISSN: | 0973-1482 |
| Popis: | Background: Water equivalent property of any clinical dosimeter is important. Water has the approximately similar radiation absorption and scattering properties to soft tissue. Film dosimeter plays a significant role in radiotherapy quality assurance and treatment plan verification. Aims: In this study, we are evaluating the water equivalent radiological properties of Gafchromic electronic benefit transfer (EBT) and EBT2 film dosimeters. Materials and Methods: Radiological properties such as number of electrons per gram (ne), electron density (ϼe), and effective atomic number (Zeff) are calculated using Mayneord formula. Mixture rule is used to calculate the mass absorption coefficient (μen/ϼ) and mass attenuation coefficient (μ/ϼ), and data are generated using Win-XCom over 10 KeV to 20 MeV. Electron stopping power data are generated with the help of ESTAR database over 10 KeV to 30 MeV. Those results are compared with water and deviations are found. Results: Our results suggest that Zeff, ne, and ϼe of EBT is showing deviations 100 KeV. Electron stopping power properties are also close in agreements with water having deviations ≤5%. Conclusion: Presence of high atomic number element chlorine, potassium, and bromine may disturb the water equivalent properties in the lower energy range |
| Databáze: | OpenAIRE |
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