Assistant Professor

Stephen Breen

MSc, PhD

Odette Cancer Centre - Sunnybrook Health Sciences Centre
Toronto, Ontario Canada
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
Please contact Faculty Member for more information


  • 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

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



Assistant Professor, Department of Radiation Oncology, University of Toronto
Head of Medical Physics dept, Odette Cancer Centre, Sunnybrook Health Sciences Centre