LOCAL IRRADL\TIO\ OF CNS WITH HIGH ENERGY PROTONS 351 









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Fig. 4. Sagittal mx liuu of rabbit's brain 13 wcrks after irradiation with a 1.5 mm 

 beam of high energy protons. A discrete lesion corresponding to the path of the beam 

 is seen. The cortical laminae are interrupted and the myelin destroyed. Increased 

 vascularity is noted in the irradiated region. Dose 20 krad. Loyez stain for myelin. 

 X 45. llie photographs are published by courtesy of Acta Radiologica. 



