Figure 1
From: Radiosurgery with photons or protons for benign and malignant tumours of the skull base: a review
Dose distribution in sagittal (A), coronal (B) and axial (D) views of a left cavernous sinus benign meningioma treated by proton radiosurgery. Tumour volume was 5.7 cubic centimetres (in red). The treatment was delivered with a dedicated radiosurgical device (STAR). A dose of 12 cobalt gray equivalent (CGyE) was prescribed to 90 per cent isodose. Three equally weighted passive scattering beams were employed. The dose-volume histogram graph (C) shows the doses to organs at risk (optic chiasm in sky-blue, left optic nerve in bright yellow, brainstem in green, left cochlea in blue, pituitary gland in dark yellow) and tumour volume (in red). Courtesy of Francis H. Burr Proton Therapy Center – Massachusetts General Hospital, Boston (USA).