Thursday afternoon - Poster Presentations - Screen3
- Oleg Belyakov (IAEA)
115. Characterization of a portal imager Amorphous Silicon Portal Vision aS 1000 for in vivo dosimetry for IMRT
Aicha Maachou (Centre de Recherche Nucléaire d'Alger)
6/22/17, 3:30 PM
Background of the study: The complex and individualized photon fluence patterns constructed during intensity modulated radiation therapy (IMRT) treatment planning must be verified before they are delivered to the patient. The aim of this work is to implement the Amorphous silicon (aSi) Electronic Portal Imaging Devices (EPIDs) in the process of IMRT treatment plans verification. The aim of...
157. The correction factors estimated for small field’s dosimetry by using 6 and 18MV energies of a linear accelerator using on radiation oncology unit
Seyed Ali Rahimi (Mazandaran University of Medical Sciences)
6/22/17, 3:40 PM
Background and purpose: Small field sizes are increasingly used in radiotherapy to deliver higher dose gradient to patients. Estimating dosimetric parameters for such fields in non-reference conditions based on the conventional protocols used at large fields, as used in the reference condition, lead to significant errors. The primary aim of this study was to determine and compare small fields...
167. Treatment plan stability to geometric uncertainties. PTV and CTV related dose-volume statistics comparison for 3D CRT, IMRT and VMAT irradiation of the «average» prostate patient in N.N. Alexandrov National Cancer Centre of Belarus.
Egor Titovich (N.N. Alexandrov National Cancer Centre of Belarus)
6/22/17, 3:45 PM
Aim or Objective: To quantify the impact of geometrical uncertainties in patient position during prostate cancer irradiation on the PTV and CTV related dose-volume statistics and to analyze the results obtained for the 3D CRT, IMRT and VMAT techniques. Methodology: For our study, we analyzed 220 treatment plans of the prostate cancer patients that were treated in the N.N. Alexandrov...
Angelo Filippo MONTI (Ospedale Niguarda - Milan, Italy)
6/22/17, 3:50 PM
Introduction: In lung cancer, SBRT is often used to deliver high doses to a small dense lesion (GTV) moving into a low density tissue (the margin generating the PTV). In order to reach an acceptable degree of accuracy, type B or MC-based algorithms should be adopted. If a modulated technique (IMRT or VMAT) is used to treat such inhomogeneous PTV, an apparently homogeneous dose distribution...