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Suggestions
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Single phase (i.e. SIB) - 54Gy to PTV1, 70.2Gy to PTV3 in 39#
➢
(original as 2 phase plan - 54/30# to PTV 1 + 16.2/9# to PTV3)
•
S&S IMRT : 9 beams (maybe non-coplanar ?)
•
VMAT: at least 2 full arcs for PTV1 & PTV3 or sequential half
arcs for PTV3
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Put priority on PTV coverage
•
Slightly turn collimator (20-30 degrees)
•
Use aiding structures for getting the dose gradients exactly
where you want them
Good luck!