|
Scarodactyl posted:This is really cool. I actually recently started buying scrap gallium aluminum gadolinium garnet crystals for use as gems--in industry it has a similar role, absorbing high energy radiation and emitting easier to detect/easier to handle (fluorescence/phosphorescence). In a gem context it means you have an insanely fluorescent dayglow gem which also glows in the dark. Powerful J/O crystal energy.
|
#
?
Jul 1, 2022 02:15
|
|
|
|
| # ? Jun 4, 2024 12:21 |
|
|
Speaking of medical scanning, I always thought this was the most disturbing scene in The Exorcist: https://www.youtube.com/watch?v=HBNdGOQ9Exk Never realized just how messed up it actually was in real life. https://en.wikipedia.org/wiki/Pneumoencephalography quote:Pneumoencephalography (sometimes abbreviated PEG; also referred to as an "air study") was a common medical procedure in which most of the cerebrospinal fluid (CSF) was drained from around the brain by means of a lumbar puncture and replaced with air, oxygen, or helium to allow the structure of the brain to show up more clearly on an X-ray image. It was derived from ventriculography, an earlier and more primitive method where the air is injected through holes drilled in the skull. Just draining the fluid out of your skull, pumping it full of air, then strapping you to a rotating gurney while blasting you with x-rays for an extended period of time while possibly awake and in extreme pain, no biggie.
|
|
#
?
Jul 1, 2022 03:03
|
|
|
Captain Hygiene posted:I love how excited everyone is to kill off the machine LOL, when it shows the MRI there's chairs and all kinds of poo poo in it. Those nerds had themselves a PARTY before they killed the machine.
|
|
#
?
Jul 1, 2022 03:35
|
|
|
Terrifying Effigies posted:Just draining the fluid out of your skull, pumping it full of air, then strapping you to a rotating gurney while blasting you with x-rays for an extended period of time while possibly awake and in extreme pain, no biggie. That will be $150,000 per treatment please!
|
|
#
?
Jul 1, 2022 03:44
|
|
|
CRUSTY MINGE posted:Powerful J/O crystal energy. They renamed to Ramaura, actually. 
|
|
#
?
Jul 1, 2022 04:26
|
|
|
Musk’s new project looking nominal
|
|
#
?
Jul 1, 2022 04:51
|
|
|
Tunicate posted:They renamed to Ramaura, actually. Strong futurama uranus/urectum vibes.
|
|
#
?
Jul 1, 2022 04:56
|
|
|
Prequel to the 90s Land Of The Lost?
|
|
#
?
Jul 1, 2022 04:59
|
|
|
It's how they filmed the cave dwelling triceratops sequence in Prehistoric Planet
|
|
#
?
Jul 1, 2022 05:06
|
|
|
The Fast and Furious 11: The Core II
|
|
#
?
Jul 1, 2022 05:08
|
|
|
wait are glowing gems/minerals actually a real things? like natural ones?
|
|
#
?
Jul 1, 2022 05:13
|
|
|
I bet that tunnel has great air circulation
|
|
#
?
Jul 1, 2022 05:37
|
|
|
this is the safest place for a jeep, as they are at lower risk of tipping over
|
|
#
?
Jul 1, 2022 05:54
|
|
|
PhazonLink posted:wait are glowing gems/minerals actually a real things? https://www.youtube.com/watch?v=hR0y8TWd2Jw
|
|
#
?
Jul 1, 2022 05:59
|
|
|
So, what did your mom's gynecologist say when he excited the Jeep?
|
|
#
?
Jul 1, 2022 06:02
|
|
|
PhazonLink posted:wait are glowing gems/minerals actually a real things? Fluorescent rocks are a real thing, yeah. They don't glow on their own, they absorb light and then emit it back out as a different colour.
|
|
#
?
Jul 1, 2022 06:10
|
|
|
Scholtz posted:https://twitter.com/ssssludge/status/1542601163174023168
|
|
#
?
Jul 1, 2022 06:21
|
|
|
thatbastardken posted:I get the dentist to give me the lead apron even when I'm not getting an X-ray, it's soothing. I don’t know if you’re joking but I have a couple of those weighted blankets (a summer one and a winter one) and I find them soothing in a similar way.
|
|
#
?
Jul 1, 2022 06:26
|
|
|
https://www.youtube.com/watch?v=BnWvq9bQkp0
|
|
#
?
Jul 1, 2022 06:41
|
|
|
thatbastardken posted:I get the dentist to give me the lead apron even when I'm not getting an X-ray, it's soothing. My dad has a lead apron, but almost all the x-rays he takes are chest x-rays so it is basically only there for legal compliance and so he can have the following conversation: "Hey, I've been working out and lost X pounds!" "Good for you! Here, put this lead apron on...That thing weighs Y% of what you've already lost" "Holy crap, the diet is working better than I thought."
|
|
#
?
Jul 1, 2022 06:57
|
|
|
The Shortest Path posted:MRI magnets are gigantic slabs (some up to 30 tonnes!) of magnetized iron bent into a precise shape. There is no turning them off, they aren't electromagnets. An electromagnet of the strength needed to be used for that kind of imaging would probably gently caress with other things, and also use enough power to run a small town. PhazonLink posted:wait are glowing gems/minerals actually a real things?  Cat Hatter posted:Thread appropriate fact: the Hindenburg was designed to use helium, but the United States was practically the only source of helium at the time and banned it's export. GWBBQ fucked around with this message at 07:23 on Jul 1, 2022 |
|
#
?
Jul 1, 2022 07:10
|
|
|
GWBBQ posted:Here's a picture 
|
|
#
?
Jul 1, 2022 07:12
|
|
|
My apologies for not including a photo. but I went and took one at 2:20AM just for you
GWBBQ fucked around with this message at 07:22 on Jul 1, 2022 |
|
#
?
Jul 1, 2022 07:15
|
|
|
Christ I had a spinal tap when I was 3 cause of meningitis and all I remember was fuuuuck that
|
|
#
?
Jul 1, 2022 07:19
|
|
|
If you'd like to see that vid without adding to the click count of a notorious copyright troll like viral hog... https://www.youtube.com/watch?v=ywv5SgVp1Kc
|
|
#
?
Jul 1, 2022 07:20
|
|
|
Cable Guy posted:If you'd like to see that vid without adding to the click count of a notorious copyright troll like viral hog... I apologize that genericized trademarks and memes have rotted my brain. 
|
|
#
?
Jul 1, 2022 07:47
|
|
|
BigHead posted:So, what did your mom's gynecologist say when he excited the Jeep? Wasn't aware gynecologists were trucklefuckers, how to excite a jeep was probably more a hobby of this specific one.
|
|
#
?
Jul 1, 2022 08:37
|
|
|
*Checks calendar* Nope, not 1st of April. Also it's not that loving crazy Russian design bureau. https://www.youtube.com/watch?v=ZrodDBJdGuo&t=69s Even a 5 year old has a better understanding of physics than this.
|
|
#
?
Jul 1, 2022 09:37
|
|
|
They must live in the Gernsback continuum
|
|
#
?
Jul 1, 2022 13:07
|
|
|
Mozi posted:as in, "man I wish I was outdoors more instead of stuck in front of a computer all day"? Extremely me feeling, I spend more time tihnking about buying a small farm and hectares of forest and working it than actually working.
|
|
#
?
Jul 1, 2022 13:32
|
|
|
https://i.imgur.com/1d4czoO.mp4
|
|
#
?
Jul 1, 2022 14:04
|
|
|
The NHS in the UK has portable MRI machines that drive around remote hospitals to provide imaging services in places that don't justify a dedicated department. Because it costs so much to turn them on and off even in a controlled manner they drive around with the magnets on. Presumably the shielding on the trucks is good enough they don't wipe the credit cards of everyone they drive past. The person who did my introduction to MR course said that shielding has got really good recently, which is great except you used to feel a gentle tugging that warned you not to wheel the patient's oxygen tank into the scanning room with them, whereas now you go straight from everything is fine to there's a big oxygen tank shaped hole in the fairing of the £3m scanner. Also because it's so rare to quench an MRI, the vents that safely carry the helium out of the room tend not to be very well maintained which means either you end up with a patient in a room full of helium or in a couple of cases, you blow the roof off the hospital. everydayfalls posted:This doesn’t even address the amount of radiation you are exposed to in ct. Which is much higher then almost any other medical imaging. CT scanners are basically doing 3D sudoku. You spin an x-ray emitter and receiver around a patient and get a bunch of data about how many x-rays were absorbed along a huge number of vectors based on the resolution of the receiver, the sample rate and how fast you're spinning the thing (usually this data comes out as a helix of vectors because the receiver is smaller than the area you want to image so the patient is sliding through the machine on the table as the scan happens). Older scanners used to use an approximation algorithm to guess the actual x-ray absorption from these vectors but increases in computing power mean most new ones mathematically solve the vectors instead. This, plus modern noise reduction algorithms means if you spend a lot of money on a brand new CT scanner you can run the X-Ray tubes at lower power and get less radiation exposure than from a plain X-Ray.
|
|
#
?
Jul 1, 2022 14:19
|
|
|
Pure evil. Pops is going to feed him those wrenches.
|
|
#
?
Jul 1, 2022 15:14
|
|
|
One of the best types of pranks
|
|
#
?
Jul 1, 2022 15:48
|
|
|
Good mastery of the "guess I'll die" face too, that seems useful for a vehicle mechanic
|
|
#
?
Jul 1, 2022 15:56
|
|
|
Somewhere back ITT there's a gif of a similar prank, except the guy is tapping the tools behind his back and only doing it when the car wheel spins. I don't think the mechanic figures it out before it ends
|
|
#
?
Jul 1, 2022 16:07
|
|
|
One of the more interesting consequences of not properly ventilating helium from an MRI: it can disable Apple devices.
|
|
#
?
Jul 1, 2022 16:18
|
|
|
The Shortest Path posted:MRI magnets are gigantic slabs (some up to 30 tonnes!) of magnetized iron bent into a precise shape. There is no turning them off, they aren't electromagnets. An electromagnet of the strength needed to be used for that kind of imaging would probably gently caress with other things, and also use enough power to run a small town. This is wrong. The entire point of the liquid helium is to cool the superconducting magnets to the point at which they’re actually superconducting. They’re superconducting electromagnets made from tin-niobium. Plain old iron isn’t used at all..There are MRIs that use permanent magnets, but they’re rare earth magnets, and they have field strengths a fraction of those that are produced by superconducting magnets, and they are a distinct minority of scanners. Cooling a permanent magnet doesn’t give it a stronger field strength.
|
|
#
?
Jul 1, 2022 16:24
|
|
|
is that a MEMS device in your pocket or are you just happy to see me? it's microscopic
|
|
#
?
Jul 1, 2022 16:25
|
|
|
|
| # ? Jun 4, 2024 12:21 |
|
|
Yeep posted:CT scanners are basically doing 3D sudoku. You spin an x-ray emitter and receiver around a patient and get a bunch of data about how many x-rays were absorbed along a huge number of vectors based on the resolution of the receiver, the sample rate and how fast you're spinning the thing (usually this data comes out as a helix of vectors because the receiver is smaller than the area you want to image so the patient is sliding through the machine on the table as the scan happens). Older scanners used to use an approximation algorithm to guess the actual x-ray absorption from these vectors but increases in computing power mean most new ones mathematically solve the vectors instead. This, plus modern noise reduction algorithms means if you spend a lot of money on a brand new CT scanner you can run the X-Ray tubes at lower power and get less radiation exposure than from a plain X-Ray. I was waiting for someone to state this. CT stands for Computed Tomography. Whoever thought of this was a goddamned genius.
|
|
#
?
Jul 1, 2022 17:00
|
|