brain scan for Parkinsons

I know this is not directly related to anything stroke. But I did ask my doctor if I was more likely to get Parkinsons as a result of the stroke, he said no but I don't trust anything he said because he really knew nothing about stroke or stroke rehab.
http://newoldage.blogs.nytimes.com/2011/05/12/a-portrait-of-parkinsons-disease/
selected paragraphs:
The procedure depends on a radioactive drug, ioflupane, approved in January by the Food and Drug Administration. Parkinson’s disease is characterized by diminishing supplies of dopamine, neurotransmitters in the brain linked to movement disorders. The new drug binds to a protein, a dopamine transporter, in a bundle of nerve fibers inside the brain, making it visible on brain scans.

Dr. Mark A. Stacy, a neurology professor and director of the movement disorders center at Duke University, said the scans provide evidence of dopamine concentration, helping physicians to decide on appropriate treatments for symptoms. The imaging technique also may help distinguish patients with essential tremor, a less acute condition than Parkinson’s disease that requires a different treatment plan.

Using something similar might be able to determine the extent of penumbra or bleed drainage damage.