[Veliladon]

>But you cannot use this anywhere where the ultrasound would be blocked by other organs.

Yes you can. If you had an array of ultrasonic transducers around the body you could have each of them in phase targeting a single spot. Beamforming is a thing we've been doing for years with RF. It's even more trivial with sound.

[thechao]

We were privy to a lab that accidentally cooked mice with gold nanoparticles in the late 90s with multiple IR lasers. After they figured the power side, it turns out that gold nanoparticles are wildly cytotoxic on a number of axes.

[a11r]

https://house.fandom.com/wiki/Clueless

[fortran77]

IN fact, they do this today to break up kidney stones. Multiple beams.

[dylan604]

How is it more trivial with sound? Sound is just a wave just like ultrasound. In fact, ultrasound has the word sound in it making it sound. So your conclusion is not sound.

[BurningFrog]

Reread, and you'll realize it means more trivial than RF.