652 / 881
Conclusions
• IMRT superior to 3DCRT for locally advanced NSCLC
– lower dose to all risk organs except low dose to lungs
• Interplay effects not really critical in IMRT
– gated delivery not crucial for IMRT
– but start off with ‘simple’ plans with large segment shapes
– additional respiration margin of about ¼ amplitude (if GTV is
delineated at mid-vent CT)
• Sound IGRT protocols are crucial