Estimation of Primary Electron Beam Parameters of Individual Linear Accelerator Using Monte Carlo Method.
10.12455/j.issn.1671-7104.240632
- Author:
Yisong HE
1
;
Hang YU
2
;
Yuchuan FU
2
;
Jinyou HU
1
;
Lian ZOU
1
Author Information
1. Medical Physics Laboratory, Cancer Center, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu,
2. Radiotherapy Physics & Technology Center, Cancer Center, West China Hospital, Sichuan University, Chengdu,
- Publication Type:Journal Article
- Keywords:
Monte Carlo simulation;
dose deposition characteristics;
individual linear accelerator;
primary electron beam parameters
- MeSH:
Monte Carlo Method;
Particle Accelerators;
Electrons;
Radiotherapy Dosage;
Phantoms, Imaging
- From:
Chinese Journal of Medical Instrumentation
2025;49(4):375-382
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To estimate the primary electron beam parameters (PEB), including energy, radial intensity distribution and average angular divergence, of the individual linear accelerator using the Monte Carlo method.
METHODS:A model of the treatment head and a standard field were built by BEAMnrc, and the dose distribution was simulated in water phantoms by DOSXYZnrc to obtain the percentage depth dose curve and off-axis ratio. By debugging the parameters mentioned above until the simulation and measurement results could match.
RESULTS:The simulation and measurement results could achieve the best match when the parameters mentioned above were 6.25 MeV, 0.95 mm and 0.1° respectively.
CONCLUSION:The PEB of a linear accelerator could have a significant impact on the output beam characteristics. Monte Carlo estimation is one of the most crucial steps in establishing an individual linear accelerator model.
