Target and Critical Structure Definitions, Dose Prescription, and Reporting for EMRT

摘要

The safe and effective implementation of intensity-modulated radiation therapy (IMRT) invites a well-prepared radiotherapy department to re-visit the overall process of treatment planning. While the general concepts are comparable to those necessary for forward-planned, three-dimensional (3-D) conformal radiotherapy, the presence of steeper dose gradients, possible tighter margins, and differences in delivery techniques require further thought about all steps to be considered in developing and implementing a treatment plan. This chapter deals primarily with concepts related to target and critical structure definitions, as well as prescribing and reporting dose. The majority of information in this chapter is related to concepts presented in International commission on Radiation Units and Measurements (ICRU) report 62, and readers are strongly encouraged to obtain and read a copy of this reference when considering implementation of EVIRT or other forms of conformal therapy.