654-655 / 2437
Re-irradiation for brain
4 isocentric arcs
partial arc
PTV : 85.5 cm3
123-115-72-77 MU
28+28+34+34 sec
15 x 2.7 Gy = 40.5 Gy
brain stem max
pt
dose = 5.4 Gy
chiasma max
pt
dose = 3.4 Gy
left opt nerve max
pt
dose = 3.9 Gy
Chiasma
Left Opt Nerv
PTV
Left Len
Right Len
Right Opt Nerv
Brain Stem
(previous treatment @60Gy [30 months], with brainstem Dmax~54Gy, LeftOptNerv & chiasma Dmax~52Gy)
MR used for planning