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Descripción
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| Intraoperative electron radiation therapy (IOERT) is a technique that combines surgery and therapeutic radiation delivered to an unresected tumour or to a post-resection tumour bed, with displacement of uninvolved organs or protection of dose-limiting tissues. The radiation is delivered by a specific applicator docked to the linear accelerator and placed directly over the tumour bed or the residual tumour. Compared to photon radiotherapy, the electron beam dose profile is much steeper, with a characteristic dose gradient (dose becomes lower than 10 % in only a few centimeters). Dose distribution is estimated with an IOERT treatment planning system (TPS) based on radiation attenuation for each tissue type, among other factors. This information is obtained from a patient¿s preoperative CT image and a scanner-specific calibration that converts CT numbers into physical density. Preoperative CT images cannot represent intra-surgical patient modifications such as retraction and displacement of structures, tumor resection or the use of protections. Several CT imaging devices that could be introduced in the IOERT protocol, either in the surgical room or in the linear accelerator room, may solve these limitations. The purpose of this study is to evaluate the image quality offered by different CT devices when they are used to estimate dose distribution for IOERT treatments | |
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Internacional
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Si |
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Nombre congreso
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29th Computer Assisted Radiology and Surgery (CARS 2015) |
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Tipo de participación
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960 |
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Lugar del congreso
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Barcelona, Spain |
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Revisores
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Si |
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ISBN o ISSN
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1861-6410 |
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DOI
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10.1007/s11548-015-1213-2 |
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Fecha inicio congreso
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24/06/2015 |
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Fecha fin congreso
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27/06/2015 |
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Desde la página
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38 |
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Hasta la página
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39 |
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Título de las actas
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Int. J. Comput. Assist. Radiol. Surg., vol 10, no. 1(suppl.) |