Academic Journal
Estimation of backscatter factor in ISO-recommended phantoms for photon beams of different beam sizes using Monte Carlo simulations.
| Τίτλος: | Estimation of backscatter factor in ISO-recommended phantoms for photon beams of different beam sizes using Monte Carlo simulations. |
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| Συγγραφείς: | Yadav R; Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India., Bakshi AK; Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.; Homi Bhabha National Institute, Mumbai 400085, India., Sapra BK; Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.; Homi Bhabha National Institute, Mumbai 400085, India. |
| Πηγή: | Journal of radiological protection : official journal of the Society for Radiological Protection [J Radiol Prot] 2026 Aug 03; Vol. 46 (3). Date of Electronic Publication: 2026 Aug 03. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: IOP Pub. Ltd Country of Publication: England NLM ID: 8809257 Publication Model: Electronic Cited Medium: Internet ISSN: 1361-6498 (Electronic) Linking ISSN: 09524746 NLM ISO Abbreviation: J Radiol Prot Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: [Bristol, UK] : IOP Pub. Ltd., [c1988- |
| Ιατρικοί όροι (MeSH): | Monte Carlo Method* , Photons* , Scattering, Radiation* , Phantoms, Imaging* , Radiometry*, Computer Simulation ; Radiation Dosage |
| Περίληψη: | Backscatter factor (BSF) is a critical correction parameter in radiation dosimetry, accounting for dose enhancement due to photon scattering within irradiated media; however, systematic evaluations beyond the ISO slab phantom remain limited. In this work, BSFs were comprehensively estimated for all ISO-recommended phantoms-slab, cylindrical, pillar, and rod-over a photon energy range of 10 keV-2 MeV and multiple field sizes using the FLUKA Monte Carlo code with an air-kerma-based formalism. The results show a strong coupled dependence of BSF on photon energy and beam size, with a characteristic peak in the intermediate energy range (∼40-80 keV) and geometry-driven variations and field-size sensitivity-maximized in the slab phantom and minimized in the rod due to scattering volume constraints, while cylindrical and pillar phantoms exhibit intermediate behaviour. To extend these results to realistic irradiation conditions, a Python-based standalone tool was developed using PCHIP interpolation and fluence-weighted averaging to compute spectrum-averaged BSFs for ISO 4037 beams, diagnostic and therapeutic spectra, and user-defined spectra, demonstrating deviation within 0%-2.3% with published data. The study provides a BSF dataset across all ISO phantoms along with a validated computational framework, enabling improved accuracy in dosimeter calibration and determination of operational quantities such asH (Creative Commons Attribution license.) |
| Contributed Indexing: | Keywords: Backscatter factor; ISO recommended phantoms; ISO slab phantom; backscatter factor beam size; photon back scattering factor |
| Entry Date(s): | Date Created: 20260722 Date Completed: 20260803 Latest Revision: 20260803 |
| Update Code: | 20260803 |
| DOI: | 10.1088/1361-6498/ae8e83 |
| PMID: | 42486140 |
| Βάση Δεδομένων: | MEDLINE |
| ISSN: | 1361-6498 |
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| DOI: | 10.1088/1361-6498/ae8e83 |