| Autor: |
Saed Al atawneh |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Iranian Journal of Medical Physics, Vol 20, Iss 1, Pp 1-6 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2345-3672 |
| DOI: |
10.22038/ijmp.2022.63725.2088 |
| Popis: |
Introduction: We present a comprehensive evaluation of three different dosimeters in 6 MV flattening filter-free beam (FFF) under charged particle dis-equilibrium conditions. Material and Methods: Diamond detector, Gafchromic film, and Un-shielded diode detector were used in this study. The total scatters factor of Jaw-shaped fields was measured starting from (10x10 cm2) down to (0.5x0.5 cm2) using True Beam Linear Accelerator (Varian) and solid water phantom. Results: The diamond detector presented more accurate results at an ultra-small field size (0.5x0.5 cm2) with a 14.1% deviation of the diode results. On the other hand, all the measurements ranged within 5% for large field sizes “i.e. Larger than 4.0x4.0 cm2”. The relative output factor (ROF) was introduced as a total scatter factor measured by a given dosimeter (x) to total scatter factor measured by diamond detector , the relative output factor values were 0.859 and 0.104 for both Diode/Diamond and Film/Diamond , combinations, respectively. Conclusion: We found that the diamond detector is the most appropriate detector for the small field dosimetry with high accuracy. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
