Arthur Lalonde, Ph.D.

Medical Physics Resident
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Current Position

Medical Physics Resident, Harvard Medical Physics Residency Program

Research Fellow (Advisors: G. Sharp & H. Paganetti)


Ph.D., Physics, Université de Montréal, Montreal, 2019

  • Thesis: “Monte Carlo evaluation of proton therapy beam range uncertainties using multi-energy CT”
  • CAMPEP accredited program.
  • Advisor: Prof. Hugo Bouchard, Ph.D.

M.Sc., Medical Physics, Université de Montréal, Montreal, 2015

  • Fast-track to Ph.D.

B. Eng., Engineering Physics, Ecole Polytechnique de Montreal, Montreal, 2014

Scholarships and Awards

  • Associate of the AAPM Science Council Associates Mentorship Program (SCAMP), 2021-2023
  • Particle Therapy CoOperative Group (PTCOG) Travel Fellowship, 2020
  • Natural Sciences and Engineering Research Council (NSERC) Postdoctoral Fellowship, 2019
  • Fonds de recherche du Québec – Nature et technologies (FRQNT) Postdoctoral Fellowship, 2019
  • Third place award at MCMA Rising Star Competition, 2019
  • Fonds de recherche du Québec – Nature et technologies (FRQNT) PhD Scholarship, 2018
  • Travel Award, Canadian Cancer Society, 2017


  1. Lalonde A, Bobic M, Winey B, Verburg J, Sharp G, Paganetti H. Anatomic changes in head and neck intensity-modulated proton therapy: comparison between robust optimization and online adaptation. Radiotherapy and Oncology (2021). DOI:
  2. Bobić M, Lalonde A, Sharp GC, Grassberger C, Verburg JM, Winey BA, Lomax AJ, Paganetti H. Comparison of weekly and daily online adaptation for head and neck intensity-modulated proton therapy. Physics in Medicine & Biology, 66 (2021). DOI:
  3. Nesteruk K, Bobic M, Lalonde A, Winey B, Lomax A, Paganetti H. CT-on-Rails versus in-Room CBCT for Online Daily Adaptive Proton Therapy of Head-and-Neck Cancers. Cancers (2021). DOI:
  4. Niepel KB, Stanislawski M, Wuerl M, Doerringer F, Pinto M, Dietrich O, Ertl-Wagner B, Lalonde A, Bouchard H, Pappas E, Yohannes I. Animal tissue-based quantitative comparison of dual-energy CT to SPR conversion methods using high-resolution gel dosimetry. Physics in Medicine & Biology (2020). DOI:
  5. Lalonde A, Winey BA, Verburg JM, Paganetti H, Sharp GC. “Evaluation of CBCT scatter correction using deep convolutional neural networks for head and neck adaptive proton therapy,” Physics in Medicine and Biology, 65 (2020). DOI: 10.1088/1361-6560/ab9fcb.
  6. Simard, M, Lalonde A, Bouchard H “Parametrization of multi-energy CT projection data with eigentissue decomposition,” Physics in Medicine and Biology, 65, 155001, (2019). DOI: 10.1088/1361-6560/ab8107.
  7. Lalonde A, Xie Y, Burgdorf B, OReilly S, Ingram WS, Yin L, Zou W, Dong L, Bouchard H, Teo BK. “Influence of intravenous contrast agent on dose calculation in proton therapy using dual energy computed tomography,” Physics in Medicine and Biology, 64, 125024, (2019). DOI: 10.1088/1361-6560/ab1e9d.
  8. Simard M, Lapointe A, Lalonde A,  Bahig H and Bouchard H. (2019). “The potential of photon-counting CT for quantitative contrast-enhanced imaging in radiotherapy,”  Physics in Medicine and Biology, 64, 115020, (2019). DOI:10.1088/1361-6560/ab1af1.
  9. Lalonde A, Simard M, Remy C, Bär E, and Bouchard H . "The impact of dual- and multi-energy CT on proton pencil beam range uncertainties: a Monte Carlo study," Physics in Medicine and Biology,63, 195012, (2018). DOI: 10.1088/1361-6560/aadf2a.
  10. Bär E, Andreo P, Lalonde A, Royle G, and Bouchard H. "Optimized I-values for the use with the Bragg additivity rule and their impact on proton stopping power and range uncertainty," Physics in Medicine and Biology, 63, 165007, (2018). DOI: 10.1088/1361-6560/aad312
  11. Lalonde A, Remy C, Simard M, and Bouchard H. " Unsupervised classification of tissues composition for Monte Carlo dose calculation,"  Physics in Medicine and Biology, 63, 15NT01, (2018). DOI: 10.1088/1361-6560/aad05f
  12. Lapointe A, Lalonde A,  Bahig H, Carrier JF, Bedwani S, and Bouchard H " Robust quantitative contrast-enhanced dual-energy CT for radiotherapy applications," Medical Physics 45, 3086, (2018). DOI: 10.1002/mp.12934
  13. Bär E , Lalonde A, Zhang R, Jee K, Yang K, Sharp G,Liu B, Royle G , Bouchard H, and Lu HM " Experimental validation of two dual‐energy CT methods for proton therapy using heterogeneous tissue samples," Medical Physics 45, 48, (2018). DOI: 10.1002/mp.12666.
  14. Remy C, Lalonde A, Béliveau-Nadeau D, Carrier JF, and Bouchard H " Dosimetric impact of dual-energy CT tissue segmentation for low-energy prostate brachytherapy: A Monte Carlo study," Physics in Medicine and Biology, 63, 025013, (2018). DOI: 10.1088/1361-6560/aaa30c
  15. Lalonde A, Bär E, and Bouchard H " A Bayesian approach to derive proton stopping powers from noisy multi-energy CT data," Medical Physics, 44, 5293, (2017). DOI: 10.1002/mp.12489
  16. Bär E, Lalonde A, Royle G, Lu HM, and Bouchard H " The potential of dual‐energy CT to reduce proton beam range uncertainties," Medical Physics, 44, 2332, (2017). DOI: 10.1002/mp.12215
  17. Lalonde A  and Bouchard H " A general method to derive tissue parameters for Monte Carlo dose calculation with multi-energy CT," Physics in Medicine and Biology, 61, 8044, (2016). DOI: 10.1088/0031-9155/61/22/8044
Located in: Physics Residents