# Utilization of Alanine Dosimetry for 10 MV Photon Beam Dose Evaluation

## TL;DR

This study shows that EPR/alanine dosimetry is a reliable method for quality control of 10 MV photon beams in radiation therapy.

## Contribution

The study evaluates the feasibility of EPR/alanine dosimetry for quality control of medical linear accelerators.

## Key findings

- The EPR signal increased by approximately 0.03 per 1 Gy per count.
- Measurement uncertainty was estimated at 2.49–4.19% (k = 1).
- EPR/alanine dosimetry is reliable for quality control of 10 MV photon beams.

## Abstract

Radiation therapy is a crucial treatment method that delivers a high dose of radiation to localized areas. Therefore, ensuring the accuracy of the radiation dose from the radiation generator is essential. Alanine dosimetry offers the advantage of being equivalent to water and tissue and is thus a valuable tool for estimating radiation doses in the human body. In this study, we aimed to assess the feasibility of utilizing electron paramagnetic resonance (EPR)/alanine dosimetry for quality control of medical linear accelerators (LINACs). The EPR signal and slope of the dose-response curve were compared with the number of alanine dosimeters per dose using a 10 MV linear accelerator, and the measurement uncertainty was evaluated. The signal increased by approximately 0.03 per 1 Gy per count, in conjunction with the slope of the dose-response curve. The measurement uncertainty, estimated based on the synthesis of eight numerical factors of the uncertainty propagation law, was approximately 2.49–4.19% (k = 1). The findings of this study suggest that the EPR/alanine dosimetry system can be reliably applied for quality control of 10 MV photon beams under the investigated experimental conditions.