Fig. 1. Aortae of rabbits fed on a high cholesterol diet. The first four aortae are of rabbits 

 irradiated once a week with 100 r over the aortic region (200 kV, 20 niA, 0-5 mm Cn) for 10 

 weeks. The last four are of non-irradiated control animals. There is an increase in atheromatous 

 lesions (stained with Sudan-red) in the irradiated group. 



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Fig. 2. Aorta with atheromatous plaque in a rabbit fed on a high cholesterol diet for 3 

 months. 



