A VMAT PLANNING SOLUTION FOR NECK CANCER PATIENTS USING THE PINNACLE(3) PLANNING SYSTEM

作者：Suditu M D^*; Adam D; Popa R; Ciocaltei V

来源：Romanian Reports in Physics, 2014, 66(2): 401-410.

• dose distribution
• volumetric modulated arc therapy
• planning target volume

Volumetric modulated arc therapy (VMAT) allows for rapid delivery of highly conformal dose distributions. The aim of this study is to evaluate VMAT planning using the Pinnacle planning system for neck cancer. This treatment technique, recently used for clinical applications, was proposed in 2008 and, in 2012, it was implemented, for the first time, in Romania. %26lt;br%26gt;A set of computed tomography data were selected for neck cancer localization and used for delineation of planning target volumes (PTV) and organs at risk, and also for the calculation of dose distribution using the inverse planning method. The total prescription dose was 70 Gy (50 Gy in PTV50 and additional 20 Gy in PTV70) for neck cancer. By the aid of the Pinnacle planning system, acceptable treatment plans were achieved, the coverage of 95 % of the PTV being between 95 % and 98 % of the prescribed dose. The radiation dose delivered to organs at risk was under the required constraint doses. VMAT proved to be a safe, qualitative and advantageous modality treatment for these types of localizations. We succeeded to achieve a dosimetric quality with an adequate coverage of PTV and a good homogeneity and conformity. By analyzing the radiation treatment plans, according to the Pinnacle planning system it results that this treatment technique is several times faster for dose distribution calculation and dose delivery as compared to other conformal radiotherapy techniques.

• 出版日期2014