Aromasin
Joined 7 years ago
Joined 7 years ago
I had a series of work done at my previous, private, dentist. He told me a had a bunch of issues with my teeth, that might include a root canal at some point in the new future, and work needed as my wisdom teeth start to come through.
I had my first check-up with the new dentist; "Your teeth are in very good condition, I have no idea why they suggested you might need a root canal". Every follow-up has been with a different dentist, and none of them have recommended treatment of any kind. It's utterly bizarre. I've never gone this long without a need for treatment of some kind. I wasn't aware of how much profiteering goes on until moving to something that is a public-service rather than a for-profit practice.
Arguably India has the class system tied to the prevailing religion, but religion too has faded with modernity. Systems have a habit of breaking under strain and time.
https://en.wikipedia.org/wiki/2025%E2%80%932026_Birmingham_b...
We go stir crazy at home now, a sensation I have forgotten since my childhood, and feel almost obliged to go out to do things lest we go crazy from boredom. It's wonderful, and I can't recommend it enough.
We're seeing a moores-law-like improvement in electric cars and their power densities. If the American car manufacturers don't want to be a part of that progress, it's on them, but Asia and Europe will continue to innovate in that area and the US will be playing catch up because they're servicing what consumers want now, not what they will probably want in the future.
I could see this being valuable for adipose tissue mapping or fatty-liver monitoring at a large scale, as the machines would be significantly cheaper, but this isn't some revolutionary magic bullet like the Twitter post is insinuating.
Passive sonar in the naval sense means listening only, not emitting. Do you mean imaging that relies solely on acoustic energy already present and emitted by the body? If so, then generally no. You have two types of "passive" imaging. First would be hardware-passive, as in MR elastography (most common), where the patient wears a transducer pad, and vibration is actively generated by a driver. You've then got algorithmically-passive, which is more analogue to passive sonar, reconstructing tissue stiffness from ambient broadband vibration without the emitted probing pulse, but that is very much entirely academic. I guess the question would be, why is it worth pursuing when you have something like optical coherence elastography (OCE) for non-invasive profiling. Doing it using noisy ultrasound method becomes redundant. There are other methods, but the outcome is the same.
Generally (this is true for all systems, not just humans) you need to induce energy into it to more effectively measure it's output. Think of it like a bell - if I want to hear the note it produces, it's much easier to hear what this is if I ring it with a hammer. Granted, it will be "passively" resonating to a point where, with a sensitive enough sensor, I could probably pick up the output without the hammer - but that is a pointless problem to solve. I could hit a bell with a soft hammer a million times over without causing damage to it. The lifetime of the person hitting it with a hammer is far shorter than the accumulative damage to the bell before it breaks. The same is true for humans. You could effectively run a very low-energy, 60Hz vibration through a person (which is how the pads work) for multiple lifetimes before it would cause significant damage, so there comes little point in solving that problem. As such, true "passive" imaging is functionally pointless if your outcome is "safely image a patient". You're overengineering your solution to solve a problem that is only relevant if your patient was planning on living for 1000+ years.
Some PE bro preaching miracles about a technology that I am sure they are in some way invested in making profit from does not convince me of it's legitimacy. My base instincts, from the unfortunate experience of working daily with PE bros, tell me the opposite in fact. It gives déjà vu of the Theranos hysteria.
>> All views are my own, and do not represent any business, company or academic institution. <<