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Intensity
Modulated Radiotherapy (IMRT): Indications and Policies Indications: Mainly for base of skull meningiomas, chordomas. Rationale: To try to deliver higher doses to chordomas and atypical or malignant meningiomas Technical
policies: To
use rigid positioning device only. CT and MR fusion for tumour
delineation. CTV and PTV are contoured as for individual sites.
Libraries for dose constraints for individual sites devised.
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