Proposals for a ICRU-50/62 -Consistent Dose Prescription Suited for IMRT Radiation Techniques

摘要

Several volume based methods of dose prescription are compared. Some of the methods distinguish the central part of the target and the margin region of any form of planning target volume. The methods are first applied to conventional radiation techniques to evaluate the consistency with the ICRU dose point concept. Furthermore the techniques are applied to IMRT plans. In addition the influence of boluses and the proximity of the planning target volume (PTV) and the surface of the patients are discussed. Two types of methods result in a high degree of consistency with the hitherto valid ICRU dose prescription concept: the median dose and the mean dose to the central part of the PTV.