The dosimetric effect of photon target degradation on C-series linear accelerators using Monte Carlo simulation.

ABSTRACT: The impact of beam dosimetry changes brought on by target degradation has not been well investigated. To determine the optimal dosimetry metrics for detecting target degradation and to investigate the impact of beam dosimetry changes brought on by target degradation. The EGSnrc Monte Carlo programs were used to model the Varian Novalis Tx linear accelerator. By altering the central portion of the photon target with a cylindrical vacuum zone, few target degradation scenarios were simulated and compared with the nominal condition. For square photon beams defined by the jaws, the effects of target degradation on beam output, beam quality (percentage depth dose, PDD), beam profile (off-axis factor), relative output factor (ROF), and wedge factor (WF) were examined. Few degradation scenarios we

SUBMITTER: Deng Y 

PROVIDER: S-EPMC12370408 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature