Commercial 2-D detectors have the potential to replace films as an "area detector" for field-related verification of IMRT. The on-line information provided by the respective systems can even improve the efficiency of the QA procedures.
PD in IMRT can be minimized by proper selection of treatment delivery method and photon beam energy. When selecting the IMRT technique in centers where compensator IMRT and MLC IMRT is available, PD burden should be taken into account. The large amount of photon components and neutron components caused by leakage radiation from the treatment head leads to the recommendation that radiation protection aspects for patients undergoing IMRT should be considered in linac design. For further clarification, additional experiments have to be carried out on other types of linacs.
VERIDOS improves the optimization of the case related part of the quality assurance work for intensity modulated radiation therapy (IMRT). The diverse functions of the software offer the radiation physicist a wide base to verify the IMRT plan independent from the mode of its delivery (compensator technology or MLC technology).
The described method offers facilities for a good dose coverage of irregular target volumes with different prescribed doses and a considerable dose reduction in adjacent organs at risk. The dose sparing of organs at risk can be further improved, if a compensator material with higher density is used.
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