Are the conformality constraints still important when organ at risk constraints are met for lung SBRT?

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...

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...