Department of Physics, Faculty of Science,, Mohammed V University, Rabat, Morocco
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Evaluation of Setup Errors in Radiotherapy with Volumetric Intensity Modulated Arc-Therapy Based On the Cone Beam Computed Tomography for Nasopharyngeal
Cancer: Case of the Cheikh Zaid Hospital
Author(s): Rachid Errifai*, Abdelouahed Chetaine and Siham Bouaouad
Introduction: The procedures for treatment with external radiotherapy are very precise. However, there are many sources of error which operate during the planning and delivery of treatment; that limit accuracy. The difficulty of reproducing the positioning of the patient from day to day is a major source of error which must be given special attention. This geometric precision is an essential parameter in the radiotherapy of cancers nasopharyngeal cancer, and the determination of the margin between the CTV and the PTV is the result of the calculation of these uncertainties.
Objective: The aim of this work is to assess the positioning accuracy of patients on the treatment table on a daily basis and to describe the method of calculating systematic and random errors, in order to establish appropriate margins from the CTV to the PTV for the patients.
Materials and metho.. View More»
DOI:
10.35248/2376-0389.22.9.3.22.4(3) 30-33
