When should single fraction SBRT be offered for peripheral NSCLC?

Based on the updated results of RTOG 0915 single fraction radiation to 34 Gy in 1 fraction is reasonable to offer to any patient with a peripheral stage I NSCLC < 5cm (limited single institution data from Germany and Japan shows safety and efficacy even for large lesions).

While RTOG 0915 does inclu...

I would also add that I think 34/1 is a "reasonable" regimen, but not the standard of care. The RTOG 0915 was a phase 2 study powered to detect toxicity endpoints between 2 regimens in routine use, but not the RTOG standard of 54/3. The study was intended to set the stage for a phase 3 study of the ...

Facing this problem with a patient today, planning on 1 instead of 3 fraction regimen. Any rib dosimetry you can share? Presumably one should be "far" enough away i.e., well into the parenchyma, such that it is a nonfactor.