Steen Madsen

Chair, Health Physics and Diagnostic Sciences Department
Professor, Health Physics and Diagnostic Sciences
Expertise: Interactions of Ionizing and Non-ionizing Radiation with Biological Tissues, Novel Laser-Based Therapeutics for Brain Tumors, Nanoparticle-Based Photothermal Therapy


Steen Madsen, is a professor and chair for the department of health physics and diagnostic sciences within the School of Allied Health Sciences. He is also the director of the comprehensive medical imaging and medical physics specializations.

Madsen’s research focuses on the use of lasers in diagnostic and therapeutic medicine, the goal of which is to develop better treatments for patients with advanced brain tumors. His studies also incorporate photoactivable drugs – a procedure known as photodynamic therapy (PDT). The results of his work will help determine the effects of combining various therapies such as PDT, ionizing radiation, hyperthermia, and anti-angiogenic treatments.

Another area of study includes the use of nanoparticles and photothermal therapy to destroy tumors.

Madsen is currently collaborating with scientists and physicians at the University of California, Irvine (Beckman Laser Institute) and at the National Hospital in Oslo, Norway.


  • B.Sc., Physics & Biology, University of Toronto
  • M.Sc., Health & Radiation Physics, McMaster University
  • Ph.D., Medical Physics, McMaster University
  • Postdoctoral Fellow in Photomedicine, Beckman Laser Institute and Medical Clinic, University of California, Irvine
  • Medical Physics Residency, Washington University Medical School, St. Louis, MO

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Steen Madsen In The News

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Articles Featuring Steen Madsen

Steen Madsen works with lab equipment and while wearing eye protection
Research | February 17, 2015

A new, nanoparticle-based drug delivery system being developed by health physics professor Steen Madsen offers new treatment for glioblastoma.