Biomedical optics play crucial roles across medicine

In this episode of the Physics World Weekly Podcast, host Tammy Freeman speaks with Brian Pogue, Professor of Biomedical Engineering at Dartmouth College and co-founder of several optics-based medical startups. Pogue discusses the transformative role of biomedical optics across medicine, from routine diagnostics like endoscopy and pulse oximetry to advanced applications in radiation therapy. He emphasizes that optics is the largest technology sector in medicine, often overlooked despite its ubiquity. The conversation dives into Cherenkov imaging—a groundbreaking technique that visualizes radiation dose in real time by detecting faint blue light emitted during treatment. Pogue’s company, Dose Optics, developed BeamSight, a camera system now deployed in over 40 cancer centers worldwide through Vision RT, enabling real-time verification of treatment accuracy. He also introduces Hypoxia Surgical, a new venture using time-gated imaging to detect tissue hypoxia in real time, with potential applications in cancer surgery and radiotherapy optimization. Pogue reflects on the future of optics in medical physics, highlighting the vast untapped potential at the intersection of optical diagnostics and radiation therapy, where complementary strengths in molecular imaging and structural assessment could revolutionize patient care. The episode concludes with a tribute to the 70th anniversary of the journal Physics in Medicine and Biology, which has published much of Pogue’s pioneering work. Key takeaways include: 1) Biomedical optics is the dominant technology in medicine, far exceeding radiation-based tools in scope; 2) Cherenkov imaging enables real-time, non-invasive verification of radiation therapy delivery, improving safety and precision; 3) Optical techniques like hypoxia imaging can guide surgical decisions and optimize radiotherapy by revealing tissue oxygen levels; 4) The integration of optical diagnostics with radiation therapy offers a fertile frontier for future innovation; 5) Real-time, visual feedback tools like BeamSight reduce human error and enhance treatment confidence; 6) Optical technologies are not just supplementary—they are foundational to modern medical practice; 7) Research in flash radiotherapy and oxygen dynamics is revealing new insights into treatment efficacy; 8) The convergence of optics and radiation physics is poised to redefine precision medicine.