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Is 3D non-coplanar conformal radiotherapy preferable over arc therapy for lung SBRT?
RTOG 0915 allows either technique, but I've heard people say that IMRT is not "technically" SBRT. Is there is a benefit to the non-coplanar 3D technique vs. VMAT or forward planned arc therapy?
Answer from: Radiation Oncologist at Academic Institution
To build on @Craig W. Stevens insights, which I appreciate very much, I want to note that for those who have been doing SBRT for some time, VMAT delivery is a relatively recent development that, as mentioned, may enhance the patient experience from the delivery standpoint. At Cleveland Clinic, ...
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Answer from: Radiation Oncologist at Academic Institution
To add to the excellent posts above, it might be educational to explain why many Rad Oncs felt (and some do still feel) that non-coplanar 3D was (or is) superior to coplanar 3D or VMAT/RapidARC/IMRT NOS. There's at least 2 reasons that are cited (I know this b/c I'm a coplanar SBRT person and I got...
Answer from: Radiation Oncologist at Academic Institution
There are several advantages to VMAT relative to standard 3D therapy, and most revolve around speed of delivery. Non-coplanar treatment with 6-9 gantry angles can take over 45 min from first photon to last photon. VMAT deliveries tend to be, at most, 3 ~ 1 minute arcs over perhaps 5 minutes. This...