This is ridiculously cool, but I have a ton of questions.

> The bubbles themselves are pockets of sulfur hexafluoride encapsulated in lipid shells. They're an FDA-approved contrast agent,

Combined with ultrasound, could these be causing damage of any kind to the vasculature?

> A few years ago, a paper came out that blew our minds. The idea was that you can decode what someone is looking at just from their brain activity.

How realistically close can this get to reading thoughts, visuals, etc.?

Do we have a path to imaging people's visual cortex? Their inner lives, dialogues, memories? (Scary thought - this could be used as an interrogation tool without consent. "Did you kill Bob?" could be a simple brain scan.)

Can it be done in real time in a feedback loop and perhaps be used as an advanced reinforcement learning system?

This kind of mind reading could easily become the end of human privacy.

That's bad enough in democracies, but the consequences in more common forms of government seem really dystopian.