IMPLEMENTATION OF AAPM TG-218 FOR PATIENT SPECIFIC QUALITY ASSURANCE (PSQA) IN THE CASE OF THORACIC TARGET REGION USING IMRT RADIOTHERAPY TECHNIQUE WITH EPID aSi-1200

Firza Indrastata Listiono; Johan Andoyo Effendi Noor; Sri  Herwiningsih; Agustinus Gatot  Dwiyono; Sri Martono; Rafiq Sulistyo  Nugroho; Alfred Julius  Petrarizky

doi:10.29303/ipr.v8i3.502

IMPLEMENTATION OF AAPM TG-218 FOR PATIENT SPECIFIC QUALITY ASSURANCE (PSQA) IN THE CASE OF THORACIC TARGET REGION USING IMRT RADIOTHERAPY TECHNIQUE WITH EPID aSi-1200

Authors

Firza Indrastata Listiono , Johan Andoyo Effendi Noor , Sri Herwiningsih , Agustinus Gatot Dwiyono , Sri Martono , Rafiq Sulistyo Nugroho , Alfred Julius Petrarizky

DOI:

10.29303/ipr.v8i3.502

Published:

2025-07-02

Issue:

Vol. 8 No. 3 (2025)

Keywords:

Patient-Specific Quality Assurance, AAPM TG-218, IMRT, Gamma Index, Electronic Portal Imaging Device, Linac TrueBeam

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Listiono, F. I., Noor, J. A. E., Herwiningsih, S. ., Dwiyono, A. G. ., Martono, S., Nugroho, R. S. ., & Petrarizky, A. J. . (2025). IMPLEMENTATION OF AAPM TG-218 FOR PATIENT SPECIFIC QUALITY ASSURANCE (PSQA) IN THE CASE OF THORACIC TARGET REGION USING IMRT RADIOTHERAPY TECHNIQUE WITH EPID aSi-1200. Indonesian Physical Review, 8(3), 690–699. https://doi.org/10.29303/ipr.v8i3.502

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Abstract

The implementation of Patient-Specific Quality Assurance (PSQA) is crucial for ensuring the accuracy and safety of Intensity-Modulated Radiation Therapy (IMRT). This study evaluates the application of AAPM TG-218 recommendations in PSQA for thoracic region treatment using the IMRT technique. The study compares two PSQA methods, Perpendicular Composite (PC) and Perpendicular Field-by-Field (PFF), using Electronic Portal Imaging Device (EPID). Measurements were conducted on 10 IMRT patients using a Varian TrueBeam Linac and Eclipse TPS. The Gamma Index (GI) analysis with criteria 3%/3 mm, 3%/2 mm, and 2%/2 mm was used to assess dose distribution accuracy. The results indicate that the average Gamma Passing Rate (GPR) for 3%/2 mm criteria exceeded 95%, which is appropriate with AAPM TG-218 standards. However, stricter criteria (2%/2 mm) did not reach the minimum recommended values. The study suggests that PSQA using EPID with the PFF method under rotational gantry conditions is the most suitable approach for thoracic IMRT treatment verification. The local standardization recommendations from the results of this study can be used as a reference for determining methodological standards in cases of the thoracic region in the IMRT technique to increase efficiency in clinical applications with similar PSQA dosimetry.

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Author Biography

Firza Indrastata Listiono, Dept. of Physics, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang 65145, Indonesia

Departement of Physics, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya

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IMPLEMENTATION OF AAPM TG-218 FOR PATIENT SPECIFIC QUALITY ASSURANCE (PSQA) IN THE CASE OF THORACIC TARGET REGION USING IMRT RADIOTHERAPY TECHNIQUE WITH EPID aSi-1200

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Author Biography

Firza Indrastata Listiono, Dept. of Physics, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang 65145, Indonesia

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