Stephen Breen MSc, PhD
Assistant Professor


Odette Cancer Centre - Sunnybrook Health Sciences Centre
Toronto, ON


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BEng, Engineering Physics, Technical University of Nova Scotia
MSc, University of Western Ontario
PhD, University of Western Ontario

Professional Memberships

Member, Canadian College of Physicists in Medicine


Assistant Professor, Department of Radiation Oncology, University of Toronto
Medical Physicist, Princess Margaret Hospital/University Health Network

Clinical Interests

Image-guided intensity-modulated radiotherapy of head and neck cancers, Positron emission tomography (PET) and single-photon emission computed tomography (SPECT) imaging in treatment planning, 4D imaging for treatment planning, Statistical process control in quality assurance, Quality management in radiation oncology


Research Synopsis

  • Online image guidance with conebeam CT for head and neck radiotherapy
  • Autosegmentation of CT images for radiotherapy treatment planning
  • Target volume delineation with PET-CT for radiotherapy treatment planning
  • Application of process control theory to quality control in radiotherapy

Publications and Awards

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