Radiation encephalopathy


Early delayed radiation encephalopathy occurs —— after irradiation


A. < 1 weeks

B. < 2 weeks

C. 2 weeks to 4 months

D .> 6 months



Acute radiation encephalopathy


Expressed in days to weeks after irradiation


Early delayed radiation encephalopathy


1–6 months post-irradiation


Delayed radiation encephalopathy

characterized histopathologically by vascular abnormalities, demyelination, and ultimately white matter necrosis is usually observed >6 months post-irradiation


Radiation encephalopathy Time periodRadiation doses
1Acute radiation encephalopathywithin a few days of
exposure
> 3 Gy.
2Early delayed radiation encephalopathy1–6 months post-irradiation
3Delayed radiation encephalopathy> 6 months post-irradiation> 35 Gy.
Radiation encephalopathy


Delayed radiation encephalopathy seen – when doses exceed 35 Gy.


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