Breast cancer radiotherapy planning for challenging anatomy
,
The Netherlands
SP-0854
Abstract
Breast cancer radiotherapy planning for challenging anatomy
Authors: Sandra Hol1, Marion Essers1
1Instituut Verbeeten, Radiotherapy, Tilburg, The Netherlands
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Abstract Text
Purpose or objective
Radiotherapy of breast cancer results in very high local control and overall survival. Therefore, reducing the dose to normal tissues as much as possible is of the utmost importance, in order to minimize both the normal tissue complication probability as well as the probability of induction of secondary tumors. In this presentation, a number of possible techniques for challenging anatomies will be presented.
Material and methods
Techniques will be presented for local and locoregional breast for challenging anatomies. The treatment planning for photon plans is performed using Eclipse (ARIA, Varian Medical Systems, Inc) with 6 and / or 10 MV beams or using Ethos Treatment Management (Varian Medical Systems, Inc), calculated using the Acuros algorithm. The proton plan is performed using Raystation (Raysearch laboratories).
Results
In many institutions, standard treatment techniques are applied for the different treatment sites. In our institution the standard techniques are tangential IMRT fields for local treatment and hybrid with a combination of open fields/IMRT fields and VMAT for locoregional and SIB. However, for challenging sites you sometimes have to deviate from the standard techniques. In addition, in The Netherlands, depending on age and risk factors such as heart, lung and contralateral breast dose, and other factors such as smoking or not, patients might be referred to a proton facility. In this presentation, examples of the standard treatment technique as well as chosen solutions for special cases will be presented.