From: Comparison of intensity modulated radiotherapy (IMRT) with intensity modulated particle therapy (IMPT) using fixed beams or an ion gantry for the treatment of patients with skull base meningiomas
Organ
Parameter
photon IMRT (%)
gantry plan(%)
horizontal plan (%)
PTV
V90
97.2
98.5
98.8
Brainstem
V40
25.6
20.5
21.4