Trinanjan BasuHCG Cancer Centre, India
Title: Overview of important “Organs at Risk” (OAR) in modern radiotherapy for Head and Neck Cancer (HNC)
With the advent of highly conformal and adaptive radiotherapy techniques, the significance of accurate delineation of Organs at Risk (OARs) is becoming more and more important. Techniques such as Intensity Modulated Radiotherapy (IMRT) and intensity/Volumetric Modulated Arc Therapy (VMAT) has allowed for improved dose conformation within the target. It has also allowed for steep dose gradients around the target for better normal tissue sparing. The accurate contouring and delineation of the OARs are thus warranted as variation in delineation has been systematically reported in studies. All these facts have led to the development of contouring guidelines for OARs in various sites. Head and Neck Cancers (HNC) are a perfect example where outcome and Quality of Life (QOL) balance remains a therapeutic challenge. There are several OARs and thus the accurate delineation following a standard guideline becomes more important. This chapter looks into the published guidelines for the delineation of such structures.
Trinanjan Basu completed his MD-Radiation Oncology at the age of 30 years from West Bengal University of Health Sciences, India. He is currently a senior consultant and DNB-radiation oncology prog-Professor at the department of radiation oncology, HCG Cancer Centre, Mumbai, India. He has over 40 publications that have been cited over 100 times. He has been serving as an editorial board member of several reputed journals, author and researcher in various National and International platforms.