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Multiple-source models for electron beams of a medical linear accelerator using BEAMDP computer code.

Nasrollah Jabbari¹, Amir Hoshang Barati², Leili Rahmatnezhad³

¹Department of Medical Physics and Imaging, Urmia University of Medical Sciences, Urmia, Iran.

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|December 31, 2013

Summary

Multiple-source models for electron beams were developed using BEAMDP code. These models accurately calculate radiotherapy dose distributions, matching Monte Carlo simulations within 1.3% for improved dosimetry research.

Keywords:

Electron therapy Linac Multiple-source model Treatment planning

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Area of Science:

Medical Physics
Radiotherapy
Computational Dosimetry

Background:

Monte Carlo (MC) simulation is a precise radiotherapy dose calculation technique.
MC simulations require detailed beam phase-space files, demanding significant computation time.
Multiple-source models offer an efficient alternative for dose calculation input.

Purpose of the Study:

Develop multiple-source models for NEPTUN 10PC medical linear accelerator electron beams.
Utilize the BEAMDP computer code for model development.
Validate the accuracy of these models for radiotherapy applications.

Main Methods:

Performed MC simulation of the accelerator head to record particle phase-space data.
Constructed multiple-source models from MC-generated phase-space files.
Generated MC dose calculations using the developed models and compared them with phase-space data.

Main Results:

Dose distributions calculated using phase-space files and multiple-source models were compared for three electron beam energies.
Measured and calculated dose distributions showed excellent agreement across all curves.
Calculated dose distributions using both methods agreed within 1.3%.

Conclusions:

Multiple-source models provide accurate dose distributions for electron beams.
These models are suitable for dosimetry research and dose calculations in radiotherapy.
The developed models offer a computationally efficient alternative to direct phase-space data input.