3D numerical test objects for the evaluation of a software used for an automatic analysis of a linear accelerator mechanical stability

Tarraf Torfeh; Stéphane Beaumont; Jeanpierre Guédon; Yassine Benhdech

doi:10.1117/12.844157

22 March 2010 3D numerical test objects for the evaluation of a software used for an automatic analysis of a linear accelerator mechanical stability

Tarraf Torfeh, Stéphane Beaumont, Jeanpierre Guédon, Yassine Benhdech

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Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76222E (2010) https://doi.org/10.1117/12.844157
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

Mechanical stability of a medical LINear ACcelerator (LINAC), particularly the quality of the gantry, collimator and table rotations and the accuracy of the isocenter position, are crucial for the radiation therapy process, especially in stereotactic radio surgery and in Image Guided Radiation Therapy (IGRT) where this mechanical stability is perturbed due to the additional weight the kV x-ray tube and detector. In this paper, we present a new method to evaluate a software which is used to perform an automatic measurement of the "size" (flex map) and the location of the kV and the MV isocenters of the linear accelerator. The method consists of developing a complete numerical 3D simulation of a LINAC and physical phantoms in order to produce Electronic Portal Imaging Device (EPID) images including calibrated distortions of the mechanical movement of the gantry and isocenter misalignments.

Citation Download Citation

Tarraf Torfeh, Stéphane Beaumont, Jeanpierre Guédon, and Yassine Benhdech "3D numerical test objects for the evaluation of a software used for an automatic analysis of a linear accelerator mechanical stability", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76222E (22 March 2010); https://doi.org/10.1117/12.844157

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KEYWORDS

Sensors

Collimators

3D image processing

Tungsten

Image segmentation

Image processing

Image quality

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