Séminaire du Laboratoire sur les réseaux desoins de santé du CIRRELT

JEUDI / THURSDAY

23 février 2017 / February 23, 2017

12h30

Salle / Room 5441 Pavillon André-Aisenstadt

Université de Montréal

Ouvert à tous / Open to all

Mehdi MahnamChaire de recherche du Canada en analytique et logistique des soins de santé

Polytechnique Montréal

Organisateur / OrganizerNadia Lahrichi

Résumé: Volumetric-modulated arc therapy (VMAT) is a new form of radiation therapy technology with more flexibility on dose delivery. In this presentation, we propose a novel heuristic for the VMAT treatment planning problem, optimizing the trade-off between delivery time and treatment quality. We present a new mixed integer programming model in which the gantry speed, dose rate, and aperture shape are determined simultaneously. Our heuristic is based on column generation; the aperture configuration is modeled in the columns and the dose distribution and time restriction in the rows.The efficiency of the algorithm and the treatment quality are evaluated on a benchmark clinical prostate cancer case. The computational results show that a high-quality treatment is achievable in about 2.64 minutes using a four-thread CPU.

SIMULTANEOUS DELIVERY TIME AND APERTURE SHAPE OPTIMIZATION FOR THEVOLUMETRIC-MODULATED ARC THERAPY (VMAT) TREATMENT PLANNING PROBLEM

Note: Mehdi Mahnam is a PhD student in industrial engineering at Polytechnique Montreal. He is amember of CIRRELT and the Canada research chair in healthcare analytics and logistics.