Brain 17 Vienna

Re-irradiation for brain

15 x 2.7 Gy = 40.5 Gy

(previous treatment @60Gy [30 months], with brainstem Dmax~54Gy, LeftOptNerv & chiasma Dmax~52Gy)

Right Len

PTV

Right Opt Nerv

Left Len

Chiasma

Left Opt Nerv

Brain Stem

PTV : 85.5 cm3

brain stem max pt chiasma max pt left opt nerve max pt

dose = 5.4 Gy

MR used for planning

dose = 3.4 Gy

dose = 3.9 Gy

4 isocentric arcs partial arc

123-115-72-77 MU 28+28+34+34 sec