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Dr. L. John Schreiner Ph.D., FCCPM
Dr. L. John Schreiner
Adjunct Full Professo
Contact Info
(613)544-2631 x4536

Current Hospital Appointment:

  • Chief Medical Physicist, 
  • Head Medical Physics Department, and 
  • Radiation Safety Officer

Areas of Clinical Interest:

  • Medical physics applied to radiation dosimetry
  • Radiation Oncology, 
  • Image guided and adaptive radiation therapy

Areas of Education Interest:

  • Undergraduate and graduate medical physics training
  • preparation for medical physics certification in radiation oncology

Areas of Research Interest:

  • Adaptive radiation therapy
  • therapy dose delivery validation
  • process quality assurance
  • cobalt radiation therapy

Current Research:

Advanced image guided radiation delivery and tomotherapy techniques with Cobalt-60 sources, Co‑60 megavoltage imaging and computed tomography (CT), quantitative CT imaging, three dimensional radiation dosimetry with gel dosimeters and magnetic resonance and optical CT imaging, conventional radiation dosimetry and computer simulations of physical quantities in radiotherapy and at diagnostic energies, clinical evaluation of dose delivery in radiation treatment.