Comparison of surface dose during whole breast radiation therapy on Halcyon and TrueBeam using Cherenkov imaging

Daniel A. Alexander; Olivia Certa; Allison Haertter; Taoran Li; Neil Taunk M.D.; Timothy C. Zhu

doi:10.1117/12.2652588

6 March 2023 Comparison of surface dose during whole breast radiation therapy on Halcyon and TrueBeam using Cherenkov imaging

Daniel A. Alexander, Olivia Certa, Allison Haertter, Taoran Li, Neil Taunk M.D., Timothy C. Zhu

Author Affiliations +

Proceedings Volume 12371, Multimodal Biomedical Imaging XVIII; 1237108 (2023) https://doi.org/10.1117/12.2652588
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

The emergence of the Halcyon linear accelerator has allowed for increased patient throughput and improved treatment times for common treatment sites in radiation oncology. However, it has been shown that this can lead to increased surface dose in sites like breast cancer compared with treatments on conventional machines with flattened radiation beams. Cherenkov imaging can be used to estimate surface dose by detection of Cherenkov photons emitted in proportion to energy deposition from high energy electrons in tissue. Phantom studies were performed with both square beams in reference conditions and with clinical treatments, and dosimeter readings and Cherenkov images report higher surface dose (25% for flat phantom entrance dose, 5.9% for breast phantom treatment) from Halcyon beam deliveries than for equivalent deliveries from a TrueBeam linac. Additionally, the first Cherenkov images of a patient treated with Halcyon were acquired, and superficial dose was estimated.

Conference Presentation

Citation Download Citation

Daniel A. Alexander, Olivia Certa, Allison Haertter, Taoran Li, Neil Taunk M.D., and Timothy C. Zhu "Comparison of surface dose during whole breast radiation therapy on Halcyon and TrueBeam using Cherenkov imaging", Proc. SPIE 12371, Multimodal Biomedical Imaging XVIII, 1237108 (6 March 2023); https://doi.org/10.1117/12.2652588

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