We can only use 5% of all the types of medicine available for treating brain diseases. Psychiatric problems, brain cancers, etc. .. all notoriously difficult to treat because medicine can’t even get to the brain in the first place.
A structure called the blood brain barrier protects it.
A few decades ago, it was first discovered that when ultrasound is used following injection of tiny silica bubbles into the blood stream, that the bubbles jiggle around just right to cut tiny holes in the barrier.
The holes are microns in diameter. They are small enough to not cause serious damage, and heal up in 48 hours.
Not large enough to cause harm, but large enough to get medicine through …
They recently dusted off the old books and started optimizing this technique to make it available for human use.
Sounds like a great start!!