Effect of Silicone Rubber–Tungsten Bolus on Surface Dose in Photon Radiotherapy

Adnan Cindyana, Heri Sutanto, Eko Hidayanto, Tri Setiyo Utami, Gita Nubuwwah Harahap

Abstract


This study investigates the characteristics and dosimetric performance of a Silicone Rubber-Tungsten (SR-W) bolus synthesized with 10 wt% tungsten. Material characterization included density measurement, Energy Dispersive X-ray (EDX) analysis, and relative electron density (RED) evaluation. The SR-W bolus demonstrated a physical density and RED comparable to bone tissue. Surface dose measurements using a photon beam LINAC showed a significant increase in surface dose when the SR-W bolus was applied compared to no-bolus conditions. The enhancement is attributed to the high-Z tungsten content, which increases secondary electron production and shifts the dose build-up region toward the surface. These results indicate that the SR-W bolus has strong potential as an effective surface dose modifier in photon radiotherapy.


Keywords


Bolus, Radiotherapy, Silicone Rubber, Tungsten

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DOI: http://dx.doi.org/10.52155/ijpsat.v55.1.7675

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