Publications

Pourya Momtaz, Mohammad Noaeen, Konrad Samsel, Neil Seeman, Robert Cribb, Syed Ishtiaque Ahmed, Amol Verma, Dionne M. Aleman, Zahra Shakeri (2025). From Patient Voices to Policy: Data Analytics Reveals Patterns in Ontario's Hospital Feedback. medRxiv.

Yiyang Qu, Hamed Shourabizadeh, Aravind Subramanian, Dionne M. Aleman, Louis-Martin Rousseau, Arjun D Law, Auro Viswabandya, Fotios V Michelis (2025). Differential impact of CD34+ cell dose for different age groups in allogeneic hematopoietic cell transplantation for acute leukemia: a machine learning-based discovery. Experimental Hematology.

Hamed Shourabizadeh, Dionne M. Aleman, Louis-Martin Rousseau, Katina Zheng, Mamatha Bhat (2025). Classification-augmented survival estimation (CASE): A novel method for individualized long-term survival prediction with application to liver transplantation. PLOS ONE.

Benjamin Z Tham, Dionne M. Aleman, Håkan Nordström, Nelly Nygren, Catherine Coolens (2024). Treatment Planning Methods for Dose Painting by Numbers Treatment in Gamma Knife Radiosurgery. Advances in Radiation Oncology.

Pieter de Jager, Dionne M Aleman, Nancy Baxter, Chaim Bell, Merve Bodur, Andrew Calzavara, Robert Campbell, Michael Carter, Scott Emerson, Anna Gagliardi, Jonathan Irish, Danielle Martin, Samantha Lee, Marcy SaxeBraithwaite, Pardis Seyedi, Julie Takata, Suting Yang, Claudia Zanchetta, David R Urbach (2024). Surgeon- and hospital-level variation in wait times for scheduled non-urgent surgery in Ontario, Canada: A cross-sectional population-based study. PLOS ONE.

Pardis Seyedi, Dionne M Aleman, Nancy Baxter, Chaim Bell, Merve Bodur, Andrew Calzavara, Robert Campbell, Michael Carter, Pieter de Jager, Scott Emerson, Anna Gagliardi, Jonathan Irish, Danielle Martin, Samantha Lee, Marcy Saxe-Braithwaite, Julie Takata, Suting Yang, Claudia Zanchetta, David Urbach (2024). Referral patterns for common surgical procedures in Ontario: a cross-sectional population-level study. Canadian Journal of Surgery.

Benjamin Z Tham, Dionne M Aleman, Robert K Heaton, Håkan Nordström, Catherine Coolens (2024). Physical dose validation of dynamic treatment for Gamma Knife radiosurgery. Medical Physics.

Faraz Khoshbakhtian, Gaurav Oberoi, Dionne M. Aleman, Siddhartha Asthana (2024). MEGA: Multi-encoder GNN Architecture for Stronger Task Collaboration and Generalization. Machine Learning and Knowledge Discovery in Databases. Research Track.

Hooman Ramezani, Dionne M. Aleman, Daniel Létourneau (2024). Lung-DETR: Deformable Detection Transformer for Sparse Lung Nodule Anomaly Detection.

Shefali Kulkarni-Thaker, Dionne M Aleman, Aaron Fenster (2024). Inverse Planning for Radiofrequency Ablation in Cancer Therapy Using Multiple Damage Models. Archives of Clinical and Biomedical Research.

Quynh Pham, David Wong, Kaylen J Pfisterer, Dionne M Aleman, Nick Bansback Der, Joseph A Cafazzo, Alexander J Casson, Brian CF Chan, William G Dixon, Gerasimos Kakaroumpas, Claudia Lindner, Niels Peek, Henry WW Potts, Barbara Ribeiro, Emily Seto, Charlotte Stockton-Powdrell, Alexander J Thompson, Sabine N van der Veer (2023). The complexity of transferring remote monitoring and virtual care technology between countries: lessons from an international workshop. Journal of Medical Internet Research.

Hootan Kamran, Dionne M Aleman, Michael W Carter, Kieran M Moore (2023). Spatio-temporal clustering of multi-location time series to model seasonal influenza spread. IEEE Journal of Biomedical and Health Informatics.

Pieter de Jager, Dionne M Aleman, Nancy Baxter, Chaim Bell, Merve Bodur, Andrew Calzavara, Robert Campbell, Michael W Carter, Scott Emerson, Anna Gagliardi, Jonathan Irish, Danielle Martin, Samantha Lee, Marcy Saxe-Braithwaite, Pardis Seyedi, Julie Takata, Suting Yang, Claudia Zanchetta, David R Urbach (2023). Social determinants of access to timely elective surgery in Ontario, Canada: a cross-sectional population level study. Canadian Medical Association Open Access Journal.

Benjamin Z Tham, Dionne M Aleman, Håkan Nordström, Nelly Nygren, Catherine Coolens (2023). Plan assessment metrics for dose painting in stereotactic radiosurgery. Advances in Radiation Oncology.

Hamed Shourabizadeh, Dionne M Aleman, Louis-Martin Rousseau, Arjun D Law, Auro Viswabandya, Fotios V Michelis (2023). Machine learning for the prediction of survival post-allogeneic hematopoietic cell transplantation: A single-center experience. Acta Haematologica.

Lizeth Carolina Riascos-Álvarez, Merve Bodur, Dionne M Aleman (2023). A branch-and-price algorithm enhanced by decision diagrams for the kidney exchange problem. Manufacturing & Service Operations Management.

Yunsheng Chen, Dionne M Aleman, Thomas G Purdie, Chris J McIntosh (2022). Understanding machine learning classifier decisions in automated radiotherapy quality assurance. Physics in Medicine and Biology.

Hootan Kamran, Dionne M Aleman, Chris McIntosh, Thomas G Purdie (2022). SuPART: supervised projective adapted resonance theory for automatic quality assurance approval of radiotherapy treatment plans. Physics in Medicine and Biology.

Lizeth Carolina Riascos-Álvarez, Merve Bodur, Dionne M Aleman (2022). A feasibility look to two-stage robust optimization in kidney exchange. arXiv.

Cheng Guo, Merve Bodur, Dionne M Aleman, David R Urbach (2021). Logic-based benders decomposition and binary decision diagram based approaches for stochastic distributed operating room scheduling. INFORMS Journal on Computing.

Faraz Khoshbakhtian, Ardian Lagman, Dionne M Aleman, Randy Giffen, Proton Rahman (2021). Prediction of severe COVID-19 outcomes at the time testing: An anomaly detection approach. medRxiv.

Dionne M Aleman, Anastasia Anagnostou, Christine Currie, John W Fowler, Esma S Gel, Alexander R Rutherford (2021). Panel on simulation modeling for COVID-19. Proceedings of the Winter Simulation Annual Conference.

Shefali Kulkarni-Thaker, Dionne M Aleman, Aaron Fenster (2021). Inverse planning for radiofrequency ablation in cancer therapy using multiple damage models. medRxiv.

Bahman Naderi, Vahid Roshanaei, Mehmet A Begen, Dionne M Aleman, David R Urbach (2021). Increased surgical capacity without additional resources: Generalized operating room planning and scheduling. Production and Operations Management.

Dionne M Aleman, Benjamin Z Tham, Sean J Wagner, Justin Semelhago, Asghar Mohammadi, Paul Price, Randy Giffen, Proton Rahman (2021). How effective was Newfoundland & Labrador's travel ban to prevent the spread of COVID-19? An agent-based analysis. medRxiv.

Shefali Kulkarni-Thaker, Dionne M Aleman, Aaron Fenster (2021). A row-generation approach for simultaneous multiple needle trajectory planning in radiofrequency ablation. medRxiv.

Lizeth Carolina Riascos-Álvarez, Merve Bodur, Dionne M Aleman (2020). A branch-and-price algorithm enhanced by decision diagrams for the kidney exchange problem. arXiv.

Vahid Roshanaei, Curtiss Luong, Dionne M Aleman, David R Urbach (2020). Reformulation, linearization, and decomposition techniques for balanced distributed operating room scheduling. OMEGA.

Dionne M Aleman, Benjamin Z Tham, Sean J Wagner, Justin Semelhago, Asghar Mohammadi, Paul Price, Jordan Bradfield, Randy Giffen, Proton Rahman, Jenna Lawrence (2020). morPOP: A fast and granular agent-based model of COVID-19 to examine school mitigation strategies in Newfoundland & Labrador. Proceedings of the 30th Annual International Conference on Computer Science and Software Engineering.

Azamat Berdyshev, Mucahit Cevik, Dionne M Aleman, Håkan Nordström, Stella Riad, Young Lee, Arjun Sahgal, Mark Ruschin (2020). Knowledge-based isocenter selection in radiosurgery planning. Medical Physics.

Vahid Roshanaei, Kyle EC Booth, Dionne M Aleman, David R Urbach, J Christopher Beck (2020). Branch-and-check methods for multi-level operating room planning and scheduling. International Journal of Production Economics.

Mucahit Cevik, Dionne M Aleman, Young Lee, Azamat Berdyshev, Håkan Nordström, Stella Riad, Arjun Sahgal, Mark Ruschin (2019). Simultaneous optimization of isocenter locations and sector duration in radiosurgery. Physics in Medicine and Biology.

Deyvison T Baia Medeiros, Shoshana Hahn-Goldberg, Dionne M Aleman, Erin O'Connor (2019). Planning capacity for mental health and addiction services in the emergency department: A discrete-event simulation approach. Journal of Healthcare Engineering.

Cheng Guo, Merve Bodur, Dionne M Aleman, David R Urbach (2019). Logic-based benders decomposition and binary decision diagram based approaches for stochastic distributed operating room scheduling. arXiv.

Deyvison T Baia Medeiros, Shoshana Hahn-Goldberg, Erin O'Connor, Dionne M Aleman (2019). Analysis of emergency department length of stay for mental health visits: A case study of a Canadian academic hospital. Canadian Journal of Emergency Medicine.

Chang Liu (2018). Predictive modeling of dosimetric quality assurance in radiation therapy.

Anni Ni He (2018). Predictive modeling of dosimetric quality assurance in radiation therapy.

Chang Liu, Dionne M Aleman, J Christopher Beck (2018). Modelling and solving the senior transportation problem. Proceedings of International Conference on the Integration of Constraint Programming, Artificial Intelligence, and Operations Research.

Mucahit Cevik, Pooyan Shirvani Ghomi, Dionne M Aleman, Young Lee, Azamat Berdyshev, Håkan Nordström, Stella Riad, Arjun Sahgal, Mark Ruschin (2018). Modeling and comparison of alternative approaches for sector duration optimization in a dedicated radiosurgery system. Physics in Medicine and Biology.

W Eric Brown, Kisuk Sung, Dionne M Aleman, Erick Moreno-Centeno, Thomas G Purdie, Chris J McIntosh (2018). Guided undersampling classification for automated radiation therapy quality assurance of prostate cancer treatment. Medical Physics.

Dionne M Aleman (2018). Fluence map optimization in intensity-modulated radiation therapy treatment planning. Decision Analytics and Optimization in Disease Prevention and Treatment.

Chang Liu, Dionne M Aleman, Chris Beck (2017). The senior transportation problem. Workshops at the Thirty-First AAAI Conference on Artificial Intelligence.

Vahid Roshanaei, Curtiss Luong, Dionne M Aleman, David R Urbach (2017). Propagating logic-based Benders' decomposition approaches for distributed operating room scheduling. European Journal of Operational Research.

Hamid R Ghaffari, Dionne M Aleman, David A Jaffray, Mark Ruschin (2017). Incorporation of delivery times in stereotactic radiosurgery treatment optimization. Journal of Global Optimization.

Vahid Roshanaei, Curtiss Luong, Dionne M Aleman, David R Urbach (2017). Collaborative operating room planning and scheduling. INFORMS Journal on Computing.

Marlee M Vandewouw (2016). Robotic path-finding in inverse treatment planning with continuous dose delivery for stereotactic radiosurgery.

Marlee M Vandewouw, Dionne M Aleman, David A Jaffray (2016). Robotic path-finding in inverse treatment planning for stereotactic radiosurgery with continuous dose delivery. Medical Physics.

Elodie Rachel Mok Tsze Chung (2016). Optimization methods for high dose rate brachytherapy treatment planning.

Shuo Wang, Vahid Roshanaei, Dionne M Aleman, David R Urbach (2016). A discrete event simulation evaluation of distributed operating room scheduling. IIE Transactions on Healthcare Systems Engineering.

Dionne M Aleman, Aurélie Thiele (2015). The Operations Research Revolution. INFORMS.

Evgueniia Doudareva, Kimia Ghobadi, Dionne M Aleman, Mark Ruschin, David A Jaffray (2015). Skeletonization for isocentre selection in Gamma Knife® Perfexion™. TOP.

Mario Ventresca, Dionne M Aleman (2015). Network robustness versus multi-strategy sequential attack. Journal of Complex Networks.

Danielle A Ripsman, Dionne M Aleman, Kimia Ghobadi (2015). Interactive visual guidance for automated stereotactic radiosurgery treatment planning. Expert Systems with Applications.

Mario Ventresca, Dionne M Aleman (2015). Efficiently identifying critical nodes in large complex networks. Computational Social Networks.

Mario Ventresca, Alexandra Szatan, Buser Say, Dionne M Aleman (2015). Deriving pandemic disease mitigation strategies by mining social contact networks. Springer Proceedings in Mathematics and Statistics.

C-H Jason Lee, Dionne M Aleman, Michael B Sharpe (2015). A fast beam orientation optimization method that enforces geometric constraints in IMRT for total marrow irradiation. International Transactions in Operational Research.

Mario Ventresca, Dionne M Aleman (2014). Pandemic preparedness & response logistics: mining social contact networks for pandemic disease mitigation strategies. OR/MS Today.

Kimia Ghobadi (2014). Optimization methods for patient positioning in Leksell Gamma Knife Perfexion.

Babak Taati, Jasper Snoek, Dionne M Aleman, Ardeshir Ghavamzadeh (2014). Data mining in bone marrow transplant records to identify patients with high odds of survival. IEEE Journal of Biomedical and Health Informatics.

Michael F Beeler, Dionne M Aleman, Michael W Carter (2014). Cost effectiveness analyses of influenza A (H1N1) vaccination programs: How accurate were they?. Journal of Infectious Diseases and Immunity.

Mario Ventresca, Dionne M Aleman (2014). Approximation algorithms for detecting critical nodes. NATO Science for Peace and Security Series D: Examining Robustness and Vulnerability of Networked Systems.

Solmaz Azari-Rad, Alanna L Yontef, Dionne M Aleman, David R Urbach (2014). A simulation model for perioperative process improvement. Operations Research for Health Care.

Michael F Beeler, Dionne M Aleman, Michael W Carter (2014). A simulation case study to improve staffing decisions at mass immunization clinics for pandemic influenza. Journal of the Operational Research Society: Special Issue on Healthcare Operations Research.

Mario Ventresca, Dionne M Aleman (2014). A region growing algorithm for detecting critical nodes. Proceedings of the International Conference on Combinatorial Optimization and Applications.

Mario Ventresca, Dionne M Aleman (2014). A randomized algorithm with local search for containment of pandemic disease spread. Computers and Operations Research.

Dionne M Aleman, Jonah Wallgren, H Edwin Romeijn, James F Dempsey (2014). A fluence map optimization model for restoring traditional fractionation in IMRT treatment planning. Optimization Letters.

Mario Ventresca, Dionne M Aleman (2014). A fast greedy algorithm for the critical node detection problem. Proceedings of Computational Social Networks at COCOA.

Mario Ventresca, Dionne M Aleman (2014). A derandomized approximation algorithm for the critical node detection problem. Computers and Operations Research.

Mario Ventresca, Dionne M Aleman (2013). Deriving public policies from contact networks. Proceedings of the 8th INFORMS Workshop on Data Mining and Health Informatics (DM-HI 2013).

Solmaz Azari-Rad, Alanna L Yontef, Dionne M Aleman, David R Urbach (2013). Reducing elective general surgery cancellations at a Canadian hospital. Canadian Journal of Surgery.

Dionne M Aleman, Hamid R Ghaffari, Velibor V Mišić, Michael B Sharpe, Mark Ruschin, David A Jaffray (2013). Optimization methods for large-scale radiotherapy problems. Systems Analysis Tools for Better Health Care Delivery.

Hamid R Ghaffari, Dionne M Aleman, David A Jaffray, Mark Ruschin (2013). Incorporation of delivery times in Leksell Gamma Knife R Perfexion TM treatment optimization. Technical Report MIE-OR-TR2013-01, University of Toronto.

Mario Ventresca, Dionne M Aleman (2013). Evaluation of strategies to mitigate contagion spread using social network characteristics. Social Networks.

Dionne M Aleman, Velibor V Mišić, Michael B Sharpe (2013). Computational enhancements to fluence map optimization for total marrow irradiation using IMRT. Computers and Operations Research.

Kimia Ghobadi, Hamid R Ghaffari, Dionne M Aleman, David A Jaffray, Mark Ruschin (2013). Automated treatment planning for a dedicated multi-source intra-cranial radiosurgery treatment unit accounting for overlapping structures and dose homogeneity. Medical Physics.

Kimia Ghobadi, Dionne M Aleman, David A Jaffray, Mark Ruschin (2013). Automated inverse planning over a continuous path using Gamma Knife Perfexion. Proceedings of the IIE Annual Conference and Expo 2013.

Babak Taati, Jasper Snoek, Dionne M Aleman, Alex Mihailidis, Ardeshir Ghavamzadeh (2012). Applying collaborative filtering techniques to data mining in bone marrow transplant records. Proceedings of the 7th INFORMS Workshop on Data Mining and Health Informatics (DM-HI 2012).

C-H Jason Lee (2012). The effects of altering discharge policies to alternate level of care patient flow.

Dionne M Aleman (2012). Predicting the spread of pandemic disease-Agent-based simulation models (where people are agents) emerge as a viable tool to address a complex problem. OR/MS Today.

Hamid R Ghaffari (2012). Optimization models and techniques for radiation treatment planning applied to Leksell Gamma Knife(R) Perfexion(TM).

Kimia Ghobadi, Hamid R Ghaffari, Dionne M Aleman, David A Jaffray, Mark Ruschin (2012). Automated treatment planning for a dedicated multi-source intracranial radiosurgery treatment unit using projected gradient and grassfire algorithms. Medical Physics.

Hamid R Ghaffari, Dionne M Aleman, David A Jaffray, Mark Ruschin (2012). A tractable mixed-integer model to design stereotactic radiosurgery treatments. Technical Report MIE-OR-TR2012-12, University of Toronto.

Michael F Beeler, Dionne M Aleman, Michael W Carter (2012). A large simulation experiment to test influenza pandemic behavior. Proceedings of the 2012 Winter Simulation Conference.

Dionne M Aleman, Michael B Sharpe (2011). Optimization methods for total marrow irradiation using intensity modulated radiation therapy. INFOR.

Michael F Beeler, Dionne M Aleman, Michael W Carter, Brian Schwartz (2011). Improving influenza pandemic mitigation policy through agent-based modeling and simulation. Proceedings of the IERC Annual Conference.

Michael F Beeler, Dionne M Aleman, Michael W Carter (2011). Estimation and management of pandemic influenza transmission risk at mass immunization clinics. Proceedings of the Winter Simulation Annual Conference.

Hamid R Ghaffari, Kimia Ghobadi, Dionne M Aleman, Mark Ruschin, David A Jaffray (2011). Automated treatment planning for dedicated multi-source radiosurgery using projected gradient and grassfire algorithms. Technical Report MIE-OR-TR2011-04, University of Toronto.

Mohammad R Oskoorouchi, Hamid R Ghaffari, Tamas Terlaky, Dionne M Aleman (2011). An interior point constraint generation algorithm for semi-infinite optimization with health-care application. Operations Research.

C-H Jason Lee, Dionne M Aleman, Michael B Sharpe (2011). A set cover approach to fast beam orientation optimization in intensity modulated radiation therapy for total marrow irradiation. Physics in Medicine and Biology.

Dionne M Aleman, Theodorus G Wibisono, Brian Schwartz (2011). A nonhomogeneous agent-based simulation approach to modeling the spread of disease in a pandemic outbreak. Interfaces Special Issue on Humanitarian Applications: Doing Good with OR.

Anna Durbin, Ashley N Corallo, Theodorus G Wibisono, Dionne M Aleman, Brian Schwartz, Peter Coyte (2011). A cost effectiveness analysis of the H1N1 vaccine strategy for Ontario, Canada. Journal of Infectious Diseases and Immunity.

Natalia E Lizon, Dionne M Aleman, Brian Schwartz (2010). Quantitatively predicting flu centre impact on Canadian healthcare resource use. Proceedings of the Winter Simulation Annual Conference.

Velibor V Mišić, Dionne M Aleman, Michael B Sharpe (2010). Neighborhood search approaches to non-coplanar beam orientation optimization for total marrow irradiation using IMRT. European Journal of Operational Research.

Dionne M Aleman, Daniel Glaser, H Edwin Romeijn, James F Dempsey (2010). Interior point algorithms: Guaranteed optimality for fluence map optimization in IMRT. Physics in Medicine and Biology.

Dionne M Aleman, Daniel Glaser, H Edwin Romeijn, James F Dempsey (2010). Interior point algorithms: Guaranteed optimality for fluence map optimization in IMRT. Technical Report MIE-OR-TR2010-04, University of Toronto.

Hamid R Ghaffari, Dionne M Aleman, Mark Ruschin, David A Jaffray (2010). An inverse planning approach to Leksell Gamma Knife Perfexion. Proceedings of the International Conference on the Use of Computers in Radiation Therapy.

Mohammad R Oskoorouchi, Hamid R Ghaffari, Terlaky Tamas, Dionne M Aleman (2010). An interior point constraint generation algorithm for semi-infinite optimization with healthcare application. Technical Report MIE-OR-TR2010-05, University of Toronto.

Velibor V Mišić, Dionne M Aleman, Michael B Sharpe (2009). Neighborhood search approaches to non-coplanar beam orientation optimization for total marrow irradiation using intensity modulated radiation therapy treatment planning. Proceedings of the IIE Annual Conference.

Dionne M Aleman, Theodorus G Wibisono, Brian Schwartz (2009). Accounting for individual behaviors in a pandemic. Proceedings of the Winter Simulation Annual Conference.

Dionne M Aleman, H Edwin Romeijn, James F Dempsey (2009). A response surface approach to beam orientation optimization in intensity-modulated radiation therapy treatment planning. INFORMS Journal on Computing: Computational Biology and Medical Applications.

Dionne M Aleman, Theodorus G Wibisono, Brian Schwartz (2009). A non-homogeneous mixing model for predicting pandemic disease spread. Proceedings of the IIE Annual Conference.

Dionne M Aleman, Michael B Sharpe (2008). Optimization methods for total marrow irradiation using intensity modulated radiation therapy treatment planning. Proceedings of the ORAHS Annual Conference.

Dionne M Aleman, Arvind Kumar, Ravindra K Ahuja, H Edwin Romeijn, James F Dempsey (2008). Neighborhood search approaches to beam orientation optimization in intensity modulated radiation therapy treatment planning. Journal of Global Optimization.

Christopher Fox, H Edwin Romeijn, Bart Lynch, Chunhua Men, Dionne M Aleman, James F Dempsey (2008). Comparative analysis of 60Co intensity-modulated radiation therapy. Physics in Medicine and Biology.

Dionne M Aleman, H Edwin Romeijn, James F Dempsey (2008). Beam orientation optimization methods in intensity modulated radiation therapy treatment planning. Optimization in Medicine and Biology.

Dionne M Aleman (2007). Optimization methods in intensity modulated radiation therapy treatment planning.

Dionne M Aleman, H Edwin Romeijn, James F Dempsey (2006). Beam orientation optimization methods in intensity modulated radiation therapy treatment planning. Proceedings of the IIE Annual Conference.