Challenges and Requirements

Abstract

MR-only radiotherapy planning is an area of active research and development. Technological advances in MR-guided delivery systems and availability of MR scanners in radiotherapy department have made the clinical integration of MR-only planning possible. The chapter outlines challenges and requirements for MR-only radiotherapy and gives background on the most important requirement of MR-only planning, namely, the development of synthetic CT. The chapter describes the simplest method for generating synthetic CT, mainly bulk density assignment, and sets the background and motivation for more advanced methods.