This Brain Disease Will Affect Nearly Every Family. Now Nanotechnology Can Detect It Early

Will your doctor be using a test like this to identify your 33% chance of getting dementia post-stroke early while something can still be done about it? 
Does your doctor have anything better than my ideas with research to back them up?
My complete list here:
Dementia prevention 19 ways 

http://www.spring.org.uk/2014/12/this-brain-disease-will-affect-nearly-every-family-now-nanotechnology-can-detect-it-early.php? 
A new type of brain scan which can detect the toxins which cause Alzheimer’s disease has been developed by scientists at Northwestern University.
The test, which uses nanotechnology, identifies the early signs of dementia and could be used to both monitor and combat the disease.
The areas of the brain which contain the amyloid beta toxins are seen on the brain scan as large dark patches.
The new test is a breakthrough because previously it was only possible to detect the amyloid plaques — once these have developed it is probably too late for any effective therapy.

More at link.