Are the conformality constraints still important when organ at risk constraints are met for lung SBRT?
Are there specific conformality parameters you prioritize (105% dose volume outside of PTV, conformality index, ratio of 50% isodose volume to PTV, and max dose at 2 cm from PTV) even when OARs constraints are met?
Answer from: Radiation Oncologist at Academic Institution
Conformality constraints required in some lung SBRT clinical trials served as useful treatment planning guides that obliged attention to reducing the exposure of adjacent normal lung tissue to high dose.I am unaware of data specifically validating any of the indices mentioned in the question as a pr...
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Answer from: Radiation Oncologist at Community Practice
Maybe we think that *every single plan* we've ever been a part of has been "optimally optimized" where no further dosimetric improvements can be made. In practice however there is always room for dosimetric improvements. Always. In his classic IMRT paper (which should be required reading for every r...