Monte Carlo simulation of a 6 MV Varian Trilogy clinical linear accelerator using Geant4 for small-field dosimetry analysis

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Monte Carlo simulation demonstrates accurate dose profiles in 6 MV linear accelerators, highlighting challenges in small-field dosimetry.

Simulation results showed a 2% difference in depth dose curves compared to experimental measurements.
Over 95% of points passed the gamma analysis for a 10 x 10 cm² field, confirming the simulation's reliability.
A Geant4-based framework facilitates correction factors for small-field dosimetry, addressing electronic disequilibrium.
Preliminary data reveals discrepancies in output factors for small photon fields, indicating a need for specific corrections.

Ribeiro et al. (2025) studied this question.

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View Full Paper

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Authors

Monte Carlo simulation demonstrates accurate dose profiles in 6 MV linear accelerators, highlighting challenges in small-field dosimetry.

Simulation results showed a 2% difference in depth dose curves compared to experimental measurements.
Over 95% of points passed the gamma analysis for a 10 x 10 cm² field, confirming the simulation's reliability.
A Geant4-based framework facilitates correction factors for small-field dosimetry, addressing electronic disequilibrium.
Preliminary data reveals discrepancies in output factors for small photon fields, indicating a need for specific corrections.

Ribeiro et al. (2025) studied this question.

View Full Paper

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