Target Volume Determination 2015

How do we delineate the CTV of elective neck?

Delineation methods

1. Manual: • RTOG atlas: https://www.rtog.org/CoreLab/ContouringAtlases/HNAtlases.aspx • Gregoire et al . Radiother Oncol 2014;110:172-81. 2. Autosegmentation • Advantages: – Improving efficacy:  reducing intra- & interobserver viriability. – Improving efficiency:  Time saving.  Personnel saving.  Streamline workflow. – Enabling adaptive radiotherapy. • Limitations: − Unavoidable visual expection & manual editing by an experienced MD.