In a century-defining leap, quantum mechanics—once confined to the abstract pages of theoretical physics—is now poised to revolutionize how we treat cancer. Otilija Keta, a physicist at Serbia’s Vinca Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, and lead author of a groundbreaking review in *Applied Sciences* (published in Serbian as *Primenjene Nauke*), argues that the very foundation of radiotherapy is being rewritten by quantum principles.
“Radiation doesn’t just damage DNA—it begins with quantum events,” Keta explains. “When a photon or ionizing particle strikes a cell, it triggers a cascade of subatomic interactions—ionization, excitation, radical formation—all governed by quantum mechanics. Our models have long treated these as black boxes. But now, we’re opening them up.”
The implications stretch far beyond hospital oncology wards. The energy sector, particularly nuclear power and advanced particle accelerator technologies, stands to gain from this quantum-driven transformation. Traditional radiotherapy relies on classical dosimetry—measuring radiation dose in gray units—but Keta and her team demonstrate how quantum-informed modeling could deliver unprecedented precision in radiation delivery. This could enhance safety protocols in nuclear facilities, improve waste management strategies, and even inform next-generation reactor shielding designs.
At the heart of the research is DNA damage modeling. Modern simulations now trace radiation tracks at the nanoscale, simulating how individual particles interact with cellular water and biomolecules. Monte Carlo methods—computationally intensive but increasingly refined—allow researchers to predict not just *how much* radiation is delivered, but *how* it triggers biological damage. “We’re no longer guessing,” says Keta. “We’re simulating the quantum dance of electrons and radicals in real time.”
Emerging quantum technologies are accelerating this shift. Quantum dots, for instance, could serve as ultra-sensitive radiation detectors, enabling real-time monitoring in high-energy environments. Quantum computing, though still nascent, promises to simulate radiation interactions at scales previously unimaginable. Meanwhile, AI is stepping in as a translator, bridging quantum-scale data with clinical outcomes.
The commercial potential is clear: faster, safer, and more effective radiation therapies could reduce healthcare costs while improving patient outcomes. For the energy sector, this means smarter radiation shielding, more accurate environmental impact assessments, and even new approaches to decommissioning nuclear sites.
As quantum science celebrates its centenary, radiotherapy finds itself at a crossroads—one where classical approximations meet quantum reality. And as Keta and her colleagues show, the future of cancer treatment—and perhaps energy safety—may well be written in the language of quanta.