Introduction:

Quality control is essential to ensure safety and prevent errors in the administration of ionizing radiation across various radiotherapy techniques.

Objective:

To evaluate the performance of the ArcCheck detector to implement a specific quality control technique for patients treated with dynamic arc therapy.

Methods:

Fifty patients treated with 6 MV and 10 MV energies on the Clinac® Varian CX were selected. Doses at the isocenter of each treatment plan were analyzed using polymethyl methacrylate phantom (30 x 30 x 15 cm³) to validate reference values between the treatment planning system and the ionization chamber. The treatment plans were also recreated using the ArcCheck.

Results:

The mean dose difference at the isocenter was -0.96% and -1.34% for 6 MV and 10 MV, respectively. The average passing rate of the dose distributions in the gamma analysis exceeded 98.0% for both energies. Conclusion: The results demonstrated good concordance with the TG-119 and TG-218 protocols, supporting the use of the detector for quality control in patient-specific treatments.

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