CNS / Brain
High-grade glioma, radiosurgery, palliative whole brain and hippocampal-avoidance whole brain — setup, MRI fusion, targets, brain OARs and cited constraints.
Brain planning is a problem of small, critical structures packed around the target. The brainstem, optic chiasm, optic nerves and cochleae tolerate far less dose than most tumors need, and they often sit only millimeters away — so MRI fusion, careful contouring and a steep dose gradient carry much of the work.
The techniques range widely. A glioma is treated over three to six weeks to an infiltrative target defined on MRI. Radiosurgery gives a very high dose to one or more small metastases in one to five fractions. Palliative whole-brain treatment uses two lateral fields shaped to the skull base, while hippocampal-avoidance whole brain is an IMRT or VMAT plan built around an MRI-defined structure in the middle of the target. Each treatment page below has its own constraint table, quoted from a published protocol with the source behind every value.
Mask setup, MRI fusion, target volumes, standard and short-course schedules and cited constraints for high-grade glioma and glioblastoma.
Single-fraction and fractionated radiosurgery for brain metastases — immobilization, MRI, targets, dose fall-off and cited constraints for 1, 3 and 5 fractions.
Conventional palliative whole-brain treatment with opposed lateral fields — setup, field shaping at the skull base, lens sparing and cited organ goals.
IMRT or VMAT whole-brain treatment that spares the hippocampi — MRI fusion, hippocampal contouring, planning priorities and the NRG CC001 limits.
Organ-by-organ contouring guides for the body region CNS / brain treatment covers, each tied to its published source.
The planning concepts used to evaluate CNS / brain plans.
Protocols, guidelines and publications relevant to CNS / brain radiotherapy.
Look up CNS / brain dose constraints by organ and fraction count, each with its source.
CNS / Brain structures
Each organ page shows its CNS / brain dose constraints with sources, plus anatomy, why it matters and contouring resources.