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Advances in FLASH radiation therapy: A review on biological foundations and clinical prospects
Yupeng Di1, Lingling Meng2, Yingjie Wang3
1Department of radiation protection medicine, School of Preventive Medicine, Fourth Military Medical University, Xi'an 710032, China; Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Xi'an 710032, China; Department of Radiotherapy, Air Force Medical Center, Fourth Military Medical University, Beijing 100142, China.
Abstract:
This paper provides a comprehensive review of the fundamental theories, clinical practices, technological advancements, current status, and future prospects of FLASH radiation therapy (FLASH-RT). As an emerging technique, FLASH-RT offers the potential to enhance therapeutic efficacy while minimizing damage to healthy tissues. We elaborate on the physical principles of the "FLASH effect" in radiation biology and its dose-distribution characteristics, describe clinical applications in tumor treatment, and evaluate protective effects on normal tissues. Furthermore, the review discusses technical advancements in equipment, dosimetry, and imaging, while analyzing current research hotspots and technical bottlenecks. We also examine pathological mechanisms, future applications, and prevailing controversies regarding safety, efficacy uncertainty, and ethics. This comprehensive discussion provides a valuable reference for deepening the understanding of FLASH-RT's translational journey.
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