To find the culprit that keeps tau proteins and amyloid peptides from functioning improperly, scientists have realized that studying brains at an early age when they are alive it would be their best bet in their quest to find a cure. Studying living brain tissue would introduce many more discoveries that dead brain tissue would not. Techniques like magnetic resonance imaging (MRI) and position emission tomography (PET) are actually not that useful in studying living brain tissue because they can provide up to a millimeter of focus on the brain, but they would not be adequate for finding the formation of brain tissue. plaques and tangles that require a higher concentration of up to about a tenth of a milliliter. But there are new tools like the multiphoton confocal microscope that are better and more precise at observing brain activity. Additionally, the FDA's approval of Amyvid has allowed for easier visualization on PET scans because its purpose is to stain amyloid proteins that cannot be seen in regular PET scans. Thanks to these surprising innovations, scientists are close to developing genetic tests that could determine an individual's risk of developing Alzheimer's.