Mayo Clinic published research in 2025 on a tool called StateViewer. It can look at a single brain scan and identify which of nine different dementia types a person has, and it got it right 88% of the time. It also let clinicians read those scans nearly twice as fast, with up to three times better accuracy than the standard process. That matters because getting a dementia diagnosis currently involves cognitive testing, blood draws, imaging, specialist referrals, and a lot of waiting — sometimes months. A tool that cuts through that with one scan changes the timeline for a lot of families.
Speech analysis is another area worth knowing about. LSU researchers published findings in 2025 showing AI can pick up on subtle changes in how people talk — things like how long they pause before finding a word, how their speech rate shifts, little hesitations that aren’t obvious to the people around them yet. The research found these patterns were sensitive enough to flag mild cognitive impairment before it was showing up in other ways. Your voice, apparently, is sending out signals your brain is giving off way before memory problems become visible to anyone.
And then there’s retinal imaging, which sounds the most like science fiction but is probably the most surprising. Tiny blood vessel changes at the back of the eye may be detectable during early cognitive decline, and AI can be trained to spot them. Researchers are genuinely exploring whether a routine eye scan could serve as an early warning system. A few years ago that sentence would have seemed absurd.