Research Institute in Oncology and Hematology

Dr. Stephen Pistorius

Medical Physicist

Senior Research Scientist, CCMB and RIOH
Director: Medical Physics Academic Program
Vice Director: Biomedical Engineering Graduate Program
Professor: Physics and Astronomy, University of Manitoba
Associate Professor: Radiology, University of Manitoba

675 McDermot Avenue
Winnipeg, MB R3E 0V9 CANADA

Phone: (204) 787-4134
U of M Phone: (204) 474-6205

Email: Dr. Stephen Pistorius M.Sc. (Med) Ph.D. (Physics), P.Phys., FCOMP


My general research interest covers the modeling and simulation of radiation transport and its application to medical imaging and radiation therapy. Currently, I have three main avenues of interest. They are Scatter Imaging (as applied to Positron Emission Tomography and x-ray Computed Tomography), Microwave Imaging (with a particular focus on breast imaging) and the use of diagnostic and megavoltage imaging for adapting, optimizing and verifying radiation therapy


Research Assistant (Supervised and Co-Supervised):
  • Syed (Bilal) Ahmed - BSc (Hons) Physics - Organ Motion Tracking

Graduate Students (Supervised and Co-Supervised):
Diego Rodriguez Herrera M.Sc. candidate, Physics Microwave Radar Imaging
Tianshao Ni M.Sc. candidate, Engineering Brachytherapy Virtual Reality Simulation
Jorge Sacristan M.Sc. candidate, Physics Microwave Imaging
Mario Solis Nepote M.Sc. candidate, Engineering Microwave Imaging
Princess Anusionwu M.Sc. candidate, Physics Electron Beam Monte Carlo Calculations
Fatimah Eashour M.Sc. candidate, Physics To Be Determined
Sajjad Aftabi M.Sc. candidate, Physics To Be Determined

Publications since 2011

PubMed Search for Dr Pistorius[Author]

Google Scholar Search

  1. D. Flores-Tapia, D. Rodriguez-Herrera, M. Solis-Nepote, N. Kopotun, S. Latif, O. Maizlish, L. Fu, Y. Gui, C-M. Hu,S. Pistorius, “Experimental Feasibility of Multistatic Holography for Breast Microwave Radar Image Reconstruction”, Medical Physics, 43(8):4674-4686, August 2016
  2. H. Sun, S. Pistorius, “A Geometric Model to Characterize Annihilation Positions Associated with Scattered Coincidences in PET: A Simulation-Based Study”, IEEE Transactions on Computational Imaging, Vol. 2(2) pp.101-108, June 2016
  3. T. Chighvinadze, S. Pistorius, “The Impact of the Number of Projections on Image Quality in Compton Scatter Tomography”, Journal of X-Ray Science and Technology, 23(6):745-758, December 2015
  4. S. Latif, D. Flores-Tapia, D. Rodriguez-Herrera, M. Solis-Nepote, S. Pistorius, L. Shafai, “A Directional Antenna in a Matching Liquid for Microwave Radar Imaging”, International Journal of Antennas and Propagation, Article ID 751739, 8 pages, October 2015
  5. S. Latif, D. Flores-Tapia, S. Pistorius, L. Shafai, “Design and Performance Analysis of the Miniaturized Water-Filled Double-Ridged Horn Antenna for Active Microwave Imaging Applications”, IET Microwaves, Antennas & Propagation, DOI: 10.1049/iet-map.2014.0122, 6 Pages, May 2015
  6. Y.S. Gui, A.M. Mehrabani, D. Flores-Tapia, L. Fu. L.H. Bai, S. Pistorius, L. Shafai, C.-M. Hu, “New Horizons for Microwave Applications Using Spin Caloritronics”, Solid State Communications, 198(2014), pp 45-51, October 2014
  7. L. Fu, W. Lu, D. Rodriguez-Herrera, D. Flores-Tapia, Y.S. Gui, S. Pistorius, C.-M. Hu, “Microwave Radar Imaging using a Solid State Spintronic Microwave Sensor”, Applied Physics Letters 105(12):122406, Doi: 10.1063/1.4896691, Sept 2014
  8. S. Latif, D. Flores-Tapia, S. Pistorius, L. Shafai, “A Planar Ultrawideband Elliptical Monopole Antenna with Reflector for Breast Microwave Imaging”, Microwave and Optical Technology Letters, Vol. 56(4), pp 808-813, April 2014
  9. T. Teo, S. Pistorius, “Tissue Motion Tracking at the Edges of a Radiation Treatment Field Using Local Optical Flow Analysis”, Journal of Physics: Conference Series Vol. 489 (012040), pp 1-4, March 2014
  10. T. Chighvinadze, S. Pistorius, “The Effect of Detector Size and Energy Resolution on Image Quality in Multi-Projection Compton Scatter Tomography”, Journal of X-Ray Science and Technology, 22(1) pp 113-128, January 2014
  11. A. Sabouni, A. Ashtari, S. Noghanian, G. Thomas, S. Pistorius, “Hybrid Binary-Real GA Optimization Approach for Breast Microwave Tomography”, ACES Journal, Vol. 28(11), pp 1005-1016, November 2013
  12. C. Gilmore, A. Zakaria, S. Pistorius, Joe LoVetri, “Microwave Imaging of Human Forearms: Pilot Study and Image Enhancement”, International Journal of Biomedical Imaging, Vol. 2013, Article ID 673027, 17 pgs, August 2013
  13. T. Teo, R. Crow, S. Van Nest, D. Sasaki, S. Pistorius, “Tracking Lung Tumour Motion Using a Dynamically Weighted Optical Flow Algorithm and Electronic Portal Imaging Device”, Measurement Science and Technology 24(2013) 074012(15pp), June 2013
  14. H. Sun, S. Pistorius, "Evaluation of Image Quality Improvements When Adding Patient Outline Constraints into a Generalized Scatter PET Reconstruction Algorithm," ISRN Biomedical Imaging, Vol. 2013, Article ID 326847, 8 pgs, May 2013
  15. C. Gilmore, A. Zakaria, J. LoVetri, S. Pistorius, “A Study of Matching Fluid Loss in a Biomedical Microwave Tomography System”, Medical Physics, Vol. 40 (2), pp 023101-1 - 023101-14, February 2013
  16. H. Sun, S. Pistorius, “Evaluation of the Feasibility and Quantitative Accuracy of a Generalized Scatter 2D PET Reconstruction Method”, ISRN Biomedical Imaging, Vol. 2013, Article ID 943051, 11 pgs, January 2013
  17. L. Fu, Z.X. Cao, S. Hemour, K. Wu, D. Houssameddine, W. Lu, S. Pistorius, Y.S. Gui, C.-M. Hu, “Microwave Reflection Imaging Using a Magnetic Tunnel Junction Based Spintronic Microwave Sensor”, Applied Physics Letters, 101 (232406), doi: 10.1063/1.4769837, December 2012
  18. D. Flores-Tapia, C. Alabaster. S. Pistorius, “Real-time Reconstruction of Three-Dimensional Cylindrical Near-Field Radar Images Using a Single Instruction Multiple Data Interpolation Approach”, IET Radar Sonar & Navigation, Vol 6(6), pp. 494-506, July 2012
  19. M. Ostadrahimi, P. Mojabi, S. Noghanian. L. Shafai, S. Pistorius, J. LoVetri, “A Novel Microwave Tomography System Based on Scattering Probe Technique”, IEEE Transactions on Instrumentation and Measurement, Vol. 61(2) pp.379-390, February 2012
  20. C. Gilmore, A. Zakaria, P. Mojabi, M. Ostadrahimi, S. Pistorius, J. LoVetri, “The University of Manitoba Microwave Imaging Repository: A Two-Dimensional Microwave Scattering Database for Testing Inversion and Calibration Algorithms”, IEEE Antennas and Propagation Magazine, Vol. 53, No. 5, pp 126-133, October 2011
  21. D. Flores-Tapia, S. Pistorius, “Real Time Breast Microwave Radar Image Reconstruction Using Circular Holography: A Study of Experimental Feasibility”, Medical Physics, 38 (10) pp 5420-5431, October 2011
  22. J.E. Alpuche Aviles, S. Pistorius, I.A. Elbakri, R. Gordon, B. Ahmad, “A 1st Generation Scatter CT Algorithm for Electron Density Breast Imaging Which Accounts for Bound Incoherent, Coherent and Multiple Scatter: A Monte Carlo Study”, Journal of X-Ray Science and Technology, 19 (4) pp 477-499, October 2011
  23. M. Ostadrahimi, P. Mojabi, C. Gilmore, A. Zakaria, S. Noghanian, S. Pistorius, J. LoVetri, “Analysis of Incident Field Modeling and Incident/Scattered Field Calibration Techniques in Microwave Tomography”, IEEE Antennas and Wireless Propagation Letters, Vol 10, pp 900-903, September 2011
  24. D. Flores-Tapia, M. O'Halloran, S. Pistorius, “A Bimodal Reconstruction Method for Breast Cancer Imaging”, Progress In Electromagnetics Research, Vol. 118, 461-486, July 2011
  25. G. Thomas, D. Flores-Tapia, S. Pistorius, “Histogram Specification: A Fast and Flexible Method to Process Digital Images”, IEEE Transactions on Instrumentation and Measurement, 60 (5), pp. 1565-1578, May 2011
  26. J.E. Alpuche Aviles, S. Pistorius, R. Gordon, I.A. Elbakri, “A Novel Hybrid Reconstruction Algorithm for First Generation Incoherent Scatter CT (ISCT) of Large Objects With Potential Medical Imaging Applications”, Journal of X-Ray Science and Technology, 19 (1), pp. 35-56, January 2011


Current Funding (Principal Investigator in bold)

  • "Medical Physics Academic Training”, CancerCare Manitoba Foundation, S. Pistorius, a $146,000 portion of the $1,809,111 “RIOH Infrastructure Grant”, S. Gibson, July 2016-June 2017
  • “Design of a Signal Classification Method for Breast Abnormality Detection in Remote Communities”, CancerCare Manitoba Foundation, S. Pistorius, D. Flores-Tapia, $55,785, July 2016-June 2018
  • “3D Multimodality Ultrasound/Microwave Breast Cancer Imaging for Treatment Monitoring”, Canadian Breast Cancer Foundation – Prairies/NWT, J. LoVetri, S. Pistorius, D. Buchanan, E. Fear, $375,000, Sept 2015-Aug 2018
  • “Microwave Imaging Infrastructure”, Canada Foundation for Innovation (CFI) Leaders Opportunity Fund, J. LoVetri, P. Mojabi S. Pistorius, $995,913 (CFI $381,805, Research Manitoba $381,805, industrial partners $ 232,303), Jan 2015-Mar 2017
  • “Hybrid Near-Field Microwave Imaging Incorporating Multistatic Adaptive Wavefront Reconstruction and Micro-Sensor Arrays for Breast Cancer Detection”, NSERC RGPIN Discovery Grant Program, S. Pistorius, $185,000, Apr 1 2011-Mar 31 2017

Honours and Awards Information

2012 Fellow of Canadian Organization of Medical Physicists
2008 Senior Member, Institute of Electrical and Electronics Engineers (IEEE)
2002 Sylvia Fedoruk Prize for Medical Physics, Canada
1987 South African Public Service Bursary, RSA
1986 Best Poster Exhibit, Academic Day, University of Stellenbosch, RSA
1985 IUPESM, IOMP & IFMBE Student Paper Award, Helsinki, Finland
1985 SAAPMB Young Investigator Award, Cape Town, RSA

Current Professional Experience

  • Vice-President, Canadian Association of Physicists, Elected: 2015
  • Senior Scientist, Research Institute of Oncology and Hematology (RIOH), Appointed: 2013
  • Vice Director, Biomedical Engineering Program, University of Manitoba Appointed: 2012
  • Senior Research Scientist, CancerCare Manitoba (CCMB) Appointed: 2010
  • Director, Professional Affairs, Canadian Association of Physicists (CAP) Elected: 2009
  • Professor, Physics and Astronomy, Faculty of Science, University of Manitoba Appointed: 2009
  • Associate Professor, Radiology, Faculty of Medicine, University of Manitoba Appointed: 2001
  • Director, Medical Physics Academic Program (UM/CCMB) Appointed: 1995
  • Section Head, Medical Physics, Radiology, University of Manitoba Appointed: 1995

Current Key Committee/Team Involvement

2016/09 - present Member Department of Physics and Astronomy, Staffing, Workplace and Priorities Committee (UM)
2016/07 - present Member Faculty of Graduate Studies Faculty Council (UM)
2016/05 - present Member Department of Physics and Astronomy Nominating Committee (UM)
2013/11 - present Member Senior Investigators Group - Research Institute in Oncology and Hematology
2012/09 - present Chair Biomedical Engineering Admissions Committee (UM)
2011/02 - present Member Advisory Board Radiation Science Research Group, Sharjah University, UAE
2008/01 - present Director CAMPEP Accredited Medical Physics Graduate Program (CCMB/UM)
2003/06 - present Member Rady Faculty of Health Sciences, College (of Medicine) Executive Council (UM)
1995/10 - present Chair Medical Physics Academic Committee (CCMB/UM)

Current Professional Contributions

2016 - present Member: International Advisory Committee 1st African Conference on Medical Physics, Biomedical Engineering and Sciences (AFROBIOMEDIC 2016)
2015 - present Reviewer Spectrochimica Acta Part B: Atomic Spectroscopy
2015 - present Grant Reviewer Diagnostic Services of Manitoba (Operating Grants)
2013 - present Grant Reviewer College of Reviewers -
Canada Research Chairs Program
2012 - present Editorial Board Member ISRN Biomedical Imaging
2011 - present Reviewer Nuclear Instruments and Methods in Physics Research, Section A
2011 - present Grant Reviewer The Dutch Cancer Society
2000 - present Associate Editor and Reviewer Medical Physics

Invited Talks and Workshops Since 2011

  1. S. Pistorius, “Turning Noise into Numbers – Part II: Using Scattered Photons in PET to Improve Functional Imaging and to Create Anatomical Images”, BME 7000 Seminar, Winnipeg MB, Mar 24 2016
  2. S. Pistorius, “Improving Outcomes, through Research, for Manitobans with Cancer and Blood Disorders”, Research Institute in Oncology and Hematology (RIOH) / CancerCare Manitoba Research Centre, Winnipeg MB, Dec 4 2015
  3. S. Pistorius, “Breast Microwave Sensing Presentations”, National Hospital, Abuja Nigeria and Groote Schuur Hospital, Cape Town South Africa, May 11-15 2015
  4. S. Pistorius, “Signal Processing and Analysis of Microwave Signals for Breast Cancer Imaging and Detection”, 2nd International Conference on Signal Processing and Integrated Networks (SPIN) 2015, Delhi India, February 19-20 2015
  5. S. Pistorius(Facilitator), “IAEA TCS 37 Modules 7 and 8: Professional Studies and Quality Management” held at the National Hospital, Abuja by the Federal Ministry of Health Nigeria and the International Atomic Energy Agency, Abuja Nigeria, June 24-July 5 2013
  6. S. Pistorius, “Turning Noise into Numbers: Process in Using Scattering to Improve Diagnostic Imaging”, Manitoba Institute of Cell Biology (MICB), CancerCare Manitoba / University of Manitoba, Winnipeg MB, May 16 2013
  7. S. Pistorius (Facilitator), “Train the Trainers Workshop on Competency Assessment for Medical Physics Residency Programme” held at the National Hospital, Abuja by the Federal Ministry of Health, Department of Hospital Services, Medical Physics Interim Training Committee, Abuja Nigeria, November 14-17 2012
  8. S. Pistorius (Chair), Workshop: “The Japanese Nuclear Accident: Impact on Nuclear Energy Future and Safety Regulations”, The Sharjah International Conference on Nuclear and Renewable Energy (SHJ-NRE11), University of Sharjah, Sharjah, UAE, April 2011

RIOH gratefully acknowledges the generous support of

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