• 0 Posts
  • 19 Comments
Joined 1 year ago
cake
Cake day: June 10th, 2023

help-circle










  • Very uninformed take, its almost laughable.

    GE isn’t the only one who makes MRIs. The other big players are Siemens, Philips, United, and to some extent Canon, Fujifoto, and Hitachi.

    No, that’s really how much it costs. The margin on MRI machines is terrible. I’d like to see you do it cheaper… “Just” build then supercool magnet for superconduction for 3T of homogenius magnetic field, build coils that handle KW of RF/gradients that can fit a human comfortably without artifacts, build the high power and precision circuitry to transmit and receive said RF, then control that equipment accurately and safely.

    Super easy, off-the-shelf stuff.

    Oh, and you can’t use any ferrous parts, nor can your power supplies generate any noise.

    That’s like, senior design level stuff amirite









  • piecat@lemmy.worldtoLemmy Shitpost@lemmy.worldWhoops
    link
    fedilink
    arrow-up
    0
    ·
    edit-2
    8 months ago

    Say you were a spy, and you think there’s a laser guarding the largest diamond in the world.

    There’s no way to detect if the laser is there without putting some form of matter in the way of the laser. Be it a hand, or spray bottle.

    Now at the museum, a mist won’t set off the alarm, but you’re still reflecting some of the photons out of the beam and into your eyes. Otherwise you wouldn’t see the beam…

    But for a quantum experiment, where we care about each individual photon, spraying a fine mist will affect the experiment. Sticking anything in that laser beam path will affect the measurement.

    So how do you make a measurement without interacting? As far as we know, you can’t.