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Figure 1 | Radiation Oncology

Figure 1

From: Technique for sparing previously irradiated critical normal structures in salvage proton craniospinal irradiation

Figure 1

Colorwash dose distributions for prior radiation therapy are shown. Case 1, on the left, received treatment for medulloblastoma, 23.4 Gy (RBE) to the neuroaxis and a boost to the posterior fossa to 55.8 Gy (RBE). The 46 Gy (RBE) isodose line (purple) encroached upon the optic chiasm (purple). Case 2, on the right, received treatment for a grade III posterior fossa meningioma to 70.2 Gy (RBE). The 62 Gy (RBE) isodose line (cyan) abutted the lateral surface of the brainstem (cyan).

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Radiation Oncology

ISSN: 1748-717X

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