ESTRO 2025 - Abstract Book

S2575

Physics - Detectors, dose measurement and phantoms

ESTRO 2025

Conclusion: Results presented in Figure 1 are in accordance with the manufacturer’s intention to increase the useful dose range from up to 10 cGy for XR-QA2 model to up to 20 cGy for the latest LD-V1 film. Lower sensitivity, and in this way extended dose range might be explained by lowering the amount of high Z additives within active layer that also lead to smaller energy dependent response with the latest LD-V1 film model. We also demonstrated that the lowest dose that can be measured with the LD-V1 film model is 0.2 cGy, as stated by manufacturer.

Keywords: reference dosimetry, gafchromic film,

References: 1.N. Tomic, C. Quintero, B. R. Whiting, S. Aldelaijan, H. Bekerat, L. Liang, F. DeBlois, J. Seuntjens, and S. Devic, “Characterization of Calibration Curves and Energy Dependence GafChromicTM XR-QA2 Model Based Radiochromic Film Dosimetry System,” Med. Phys. 41, 062105 (2014); 2.A. Nobah, S. Aldelaijan, S. Devic, N. Tomic, Jan Seuntjens, Mohammed Al-Shabanah, Belal Moftah, “Radiochromic Film Based Dosimetry of Image Guidance Procedures on Different Radiotherapy Modalities,” J. Appl. Clin. Med. Phys. 15(6), 229-239 (2014).

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Digital Poster Evaluation of THGEM Detectors for Precise Dose Measurement in Conventional and Flash Radiotherapy Tianli Qiu 1 , Yi Peng 1 , Herun Yang 2 , Feng Yang 1 , Junxiang Wu 1 , Wan Luo 3 1 Radiotherapy Center, SiChuan Cancer Hospital, Sichuan, China. 2 Institute of Modern Physics, Chinese Academy of Sciences, Gansu, China. 3 Radiotherapy Center, Zigong Fourth People's Hospital, Sichuan, China