ABSTRACT
ICRU Report 62 provides recommendations on the volumes and absorbed doses that are important in prescribing, recording and reporting photon beam therapy, utilizing the new and improved irradiation techniques that have become available since the publication of ICRU Report 50 in 1993.
The new techniques rely on the ability of modern imaging procedures to provide more complete information on the location, shape and limits of target volumes and organs at risk. Margins around the target volumes become more critical in this situation and the Report addresses this question in some detail, introducing new concepts and refining previous recommendations.