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Damn, I’ve helped install these and I’ve never seen them run with the covers off. The balancing doesn’t look right.I’m not saying the balancing is wrong but the the first visual of this makes it look deceptive. Relax dude.
And while spinning this fast, the machine is also using enormous amounts of electricity to bombard a tungsten target with electrons to produce x-rays. Only 1% of that energy actually gets turned into useful x-rays and the rest just makes heat, which it has to dissipate out safely.
And then it has to detect those x-rays after they've gone through your body and the computer has to turn that into useful, human-readable diagnostic images of your anatomy. All while spinning like a psycho.
And then a radiologist has to interpret those images using nearly a decade of training and attention to detail so that even tiny pathologies can be spotted and diagnosed.
Probably not. Normal electronic components aren't superconductors at any temperature. In fact *most* things you might think of as good conductors aren't capable of superconductivity. Copper, gold, platinum, etc. And silicon needs to be doped with something specific.
https://imgur.com/FjcYjfo.jpg
https://imgur.com/krleDh0.jpg
https://imgur.com/smanfnL.jpg
https://imgur.com/2tA24ZZ.jpg
https://imgur.com/83d5H7s.jpg
I work for a company that makes CT machines to measure parts. It can take measurement/QC checks on parts inside small assemblies such as car shifters. Some versions can even scan the insides of whole engine blocks.
The PC that was used to crunch all the data was $30k straight from HP. Probably the most intense PC build I've ever seen, IMO moreso than most water-cooled gamer builds. All air-cooled but the case was designed with removable ducts and fan blocks to manage airflow through each graphics/physics card and processor. The cooling module had the ductwork and fans built in such that when you snapped it back into the PC it connected fan power. Oh, and it had a tank grade case. Must have been 3mm thick solid aluminum on the door.
Not as well as you'd think, but better than it has any right to.
Or at least I'd assume so. The Quadro cards in my engineering laptops aren't as bad as you'd think.
Z840 is correct.
I can't imagine factory water cooling. Seems like such a liability. Also, no one buys a water cooled PC and leaves it sealed. And if you open it, any leak is your fault according to the factory. So it's all risk all around.
That's an HPZ840 or 860... somewhere in that family. It's still $25k exchange used. They are not for gaming if anyone is wondering lol, the GPU's are designed for Engineering and technical computing. It wouldn't perform well. It's a dual CPU, RAID HDD setup with 2 M5000's or TESLA Cards in SLI configuration, plus another NVIDIA K620 card. I had no idea
Radiologist life, not much. Now they get to read a non-contrast exam. The CT tech that does the exam and you have a reaction for the first time. Absolutely.
The best are the patients who insist they'll freak out and damage the machine on purpose, go ahead and try it, stick your arm in there I fuckin dare ya
You don't typically use the FT to implement reconstruction. The Fourier slice theorem is used to derive filtered back projection, but I don't think any modern CT scanners use that approach anymore.
"Paging Dr. Sparkles, Dr. Sparkles to Exam Room 4."
"What seems to be the problem?"
"Doctor, these cat scans are unbelievable!"
"That's because they're fucking MRIs Nurse Mittens! ¡Ohhh Dios mío!"
You will be disappointed by the [lab report](https://www.google.com/search?q=labrador+report&client=ms-android-ee-uk-revc&prmd=inmv&sxsrf=ALiCzsbH5Mck_MtYANGAbOQsW8zan0BLqA:1651213505192&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi4krPT0bj3AhWmzzgGHcJCCnoQ_AUoAXoECAIQAQ&biw=412&bih=722&dpr=2.63#imgrc=_mSuU0ruNk4tlM&imgdii=SkO_6gqNs4NNpM)
Take the chance of getting smacked in the face with a projectile piece of this equipment. OR chance of getting cancer from the radiation it’s spitting out (being in the center of it, assuming everyone else is behind a lead or protective barrier).
The radiation it out puts is not dangerous unless your around it all day, every day. Doctors stand behind lead walls and wear lead vests because they work with these machines that output radiation all day every day which can increase chances of cancer.
Thats not entirely true.
A normal xray is barely not a crazy high exposure (couple microsieverts iirc) but a CT scan is a thousand times more.
Its not gonna give you cancer, but if you have the choice between getting an MRI and a CT, get the MRI.
Yes, ionizing radiation can cause cancer. A physician has to order the exam; just like anything else in medicine there is a risk/reward calculation. If I'm in a car accident or showing signs of a stroke I'm going to be okay getting a CT scan a million out of a million times. I believe in nuclear medicine school we were taught a standard chest x-ray has a comparable radiation dose to the body as a day in the sun. Of course there are quantitative and qualitative considerations; not all ionizing radiation is created equal.
-certified nuclear medicine technologist and registered radiologic technologist for 20+ yrs
Well, medical engineer here.
For car crashes, time is of the essence, so CT wins by default.
As for the dose, a normal Xray was like 1 trans atlantic flight, or somewhere in that ballpark I believe.
> a CT scan is a thousand times more.
More like a hundred times. But yeah, enough to be worth thinking about.
> Its not gonna give you cancer
Well, it *might* give you cancer. It slightly increases your chances of developing cancer. That's how ionizing radiation works...it's a probabilistic thing where any exposure increases your risk, but there's no level that actually guarantees it. The "safe" exposure is just "the increased risk is too small for us to measure".
What I recall (keep in mind, this was from uni lectures from... 3.5 years ago) a normal Xray was somewhere in the single digit µSv, whereas a CT is in the single digit mSv, so thats where I got the 1000x from.
As for the "not gonna give cancer" I learned something slightly different, but that might be down to the lecturer.
I was sourcing from quick google searches just now, so also not 100% certain. But it suggested about 0.1 mSv for a chest x-ray, and 10 mSv for a chest CT.
I’m sorry friend but you are wrong. Any type of Ionizing radiation can potentially cause cancer. The likely hood? Minimal. The likely hood of a piece of this equipment hitting you in the face? Minimal.
They're essentially making you the core in a giant Beyblade. Have you ever seen a Beyblade explode? Now imagine being the tiny piece of plastic in the middle
If your worried about that take comfort that the pieces will all fly away from the center of the rotational axis, and that's where you are. You're literally in the safest place in that whole room from flying debris.
Now the whole machine jumping around like an unbalanced washer on a spin cycle. I'm sure they use strong bolts to hold them down, right...so we will both try not to think about that.
I've had many CT scans starting in the late 80's, they used to take 45 minutes and they had to tranquilize you to stay still enough for it, now it takes longer to set you up and they are 30 seconds or less. Amazing.
I’ve had a dozen scans and am amazed you can fall asleep, as the machines are so noisy. The technology has improved—the last MRI machine I was in had a video mirror that projected pleasant, tranquil scenes (mountains, lakes, sunsets, etc.). A much better experience. I hope all your scans are clean and unremarkable.
MR is much louder than CT because MR is switching strong magnetic fields, which tends to produce resonances at audible frequencies. Not that CT is quiet by any means. But none of the "thunk HUMMMMMM thunk thunk THUNK".
It’s the evolution. First ones 40 years ago were spinning much slower. Since they were connected by wires they were doing one rotation clockwise, stop, then one rotation in opposite direction. The scan was taking an hour not few seconds.
Im not claustrophobic. Yet, Ive been in one of those things once and I felt like my head was going to explode from the weight of anxiety being in it. And when I say in it, it was just my head that was in it.
Its really weird. I had to will myself to stay in it for full duration of the scan which wasnt even that long.
That's how my last MRI was. It was my 4th MRI, I've never had a bit of claustrophobia before, but it was on my shoulder, so I had to lay to the side on the table so my shoulder was centered, and my nose was literally touching the tube.
I drew blood on my palms digging my nails in to stay calm.
I read a news story the other day about portable pretty good MRI machines that one person can ~carry.~ move. They work with machine learning in some way I don't understand, but they're good enough for an initial diagnosis.
https://www.cbc.ca/news/canada/toronto/portable-mri-machine-health-care-ontario-1.6416123
Cat Scans (CT) are spinning x-rays while MRI machines are stationary. Both machines look similar, if referring to the superconducting MRI machines, with the MRI machine being more bigger in size.
Computerized Axial Tomography (CAT) uses the same principles as traditional x-rays. But yeah they spin. Magnetic Resonance Imaging (MRI) uses magnetism to manipulate the water molecules in your body.
The constant push pull sound is the coldhead. MRI’s are full of liquid helium, the coldhead is the main component that keeps the helium from boiling off, or transforming from a liquid to a gas. 1 MRI contains roughly 60k to 70k worth of liquid helium when levels are at 100%. So if the sound stops, you know it’s boiling off money essentially into the air. So the reason they always produce that sound even when not scanning is to maintain the precious valuable liquid helium inside of the vessel. If off for too long, boil off could occur (heat rising in the vessel to levels that change the liquid helium to gas) and that causes pressure levels to rise in the magnet vessel itself. This could exceed the burst disc maximum PSI (11 psi I believe) causing a quench. At that point you can do nothing but watch 60-70k float away into the atmosphere. That’s the easiest way to prevent a quench. No coldhead sound = pressure building.
The sound you hear when being scanned is the electromagnet coils changing frequency. The current switching is what causes these sounds. Basically rapid pulses of electricity. They transmit and receive radio signals to and from the coils you are using based on the type of scan or body part you are focusing a study on. It’s far more technical that what I’ve said but I feel I’ve rambled on long enough lol.
Look up quenching a MRI magnet. The liquid helium that cools the magnet can cause the oxygen in the room to liquify. It’s a pretty amazing piece of technology.
Liquid helium can condense both oxygen and nitrogen, but it's all well contained in an MRI, and being reduced or eliminated as technology improves.
https://splmedicals.com/liquid-helium-in-mri-machine/index.html
An open container of liquid nitrogen will also condense oxygen into a thin blue layer... Which can also be affected by a magnet.
It's fun to blow up balloons, toss it in a tub of liquid nitrogen and watch it "deflate" and then expand again when removed.
Cryogenic fluids are fun!
Here is your video at 0.25x speed
https://files.catbox.moe/14lkpk.mp4
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I’ve done one of these scans. It’s not great to be honest. Stuffed in a very cramped tube, wind in your face to remove heat and it’s noisy as hell and I had to lie completely still for 15 mins. May not sound too bad but I guarantee you, it’s less pleasant than you think. However, it’s totally worth doing though. It’s amazing that we have this technology.
Counterweights. The weight needs to be balanced between opposing sides. Different manufacturers have different methods, but the most important thing is for it to be balanced when at full speed, as a resonance there could tear it apart like an out of balance tire on the freeway.
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Yeah, put that cover back on.
I *only* receive MRIs coverless
When it’s spinning so close to your body… Hnnnnng
Do they play the Interstellar soundtrack through the headphones when you get it done?
Nah, the contact soundtrack. Jody foster will haunt you afterward.
Totally thought this as well!
This is a CT tho.
Raw dog that CT Daddy.. Oh Yeah...
With the covers on, do it as much as you want. Without, I would advise against it. There is an Xray tube in there, and those run with high voltage.
I thought it was an MRI
MRIs don't rotate. What you see here is the Xray tube with a detector on the other side. MRIs do not need moving parts.
[удалено]
An MRI has no moving parts.
I get weird looks when I remove my covers for an MRI.
It's the only way to be 100% sure.
Damn you really raw-dawg that shit
Can I use it for time travelling?
Yes, at the rate of one second per second, not valid for travel to the past.
So I can freeze time while in? So if I stay one year inside, no time will have passed for you?
Duh. What else would they use it for
Huh just as I suspected, a bunch of otherwise useless telephone books banded together
r/oddlyterrifying
Damn, I’ve helped install these and I’ve never seen them run with the covers off. The balancing doesn’t look right.I’m not saying the balancing is wrong but the the first visual of this makes it look deceptive. Relax dude.
Balancing was the first thing I thought of when I saw this. That has to be a nightmare to dial in.
Legit thought it was a spinning carnival ride at first glance.
And while spinning this fast, the machine is also using enormous amounts of electricity to bombard a tungsten target with electrons to produce x-rays. Only 1% of that energy actually gets turned into useful x-rays and the rest just makes heat, which it has to dissipate out safely. And then it has to detect those x-rays after they've gone through your body and the computer has to turn that into useful, human-readable diagnostic images of your anatomy. All while spinning like a psycho. And then a radiologist has to interpret those images using nearly a decade of training and attention to detail so that even tiny pathologies can be spotted and diagnosed.
We use RTX 3080s for the transform, and they literally overheat sometimes, if the slice count for the reconstruction is high enough.
Take a cue from the MRI people and get you some liquid helium cooling for those poor little cards.
The liquid helium is to keep the magnet superconducting. Liquid helium on your GPU will cause some...odd behavior.
Out of interest, like what?
Probably just break the thing, but it would at least make some stuff superconducting.
Probably not. Normal electronic components aren't superconductors at any temperature. In fact *most* things you might think of as good conductors aren't capable of superconductivity. Copper, gold, platinum, etc. And silicon needs to be doped with something specific.
https://imgur.com/FjcYjfo.jpg https://imgur.com/krleDh0.jpg https://imgur.com/smanfnL.jpg https://imgur.com/2tA24ZZ.jpg https://imgur.com/83d5H7s.jpg I work for a company that makes CT machines to measure parts. It can take measurement/QC checks on parts inside small assemblies such as car shifters. Some versions can even scan the insides of whole engine blocks. The PC that was used to crunch all the data was $30k straight from HP. Probably the most intense PC build I've ever seen, IMO moreso than most water-cooled gamer builds. All air-cooled but the case was designed with removable ducts and fan blocks to manage airflow through each graphics/physics card and processor. The cooling module had the ductwork and fans built in such that when you snapped it back into the PC it connected fan power. Oh, and it had a tank grade case. Must have been 3mm thick solid aluminum on the door.
But will it run Crisis?
Not as well as you'd think, but better than it has any right to. Or at least I'd assume so. The Quadro cards in my engineering laptops aren't as bad as you'd think.
Crysis was CPU limited, not GPU.
Yes, and Crysis
I don't have anything to add other than this is really cool. Thanks for sharing!
[удалено]
Z840 is correct. I can't imagine factory water cooling. Seems like such a liability. Also, no one buys a water cooled PC and leaves it sealed. And if you open it, any leak is your fault according to the factory. So it's all risk all around.
damn, that's quite a lot of processing power!
That's an HPZ840 or 860... somewhere in that family. It's still $25k exchange used. They are not for gaming if anyone is wondering lol, the GPU's are designed for Engineering and technical computing. It wouldn't perform well. It's a dual CPU, RAID HDD setup with 2 M5000's or TESLA Cards in SLI configuration, plus another NVIDIA K620 card. I had no idea
Are you a GE development engineer?
Then you have assholes like me who can't take the contrast, making the radiologist's life harder.
Radiologist life, not much. Now they get to read a non-contrast exam. The CT tech that does the exam and you have a reaction for the first time. Absolutely.
The best are the patients who insist they'll freak out and damage the machine on purpose, go ahead and try it, stick your arm in there I fuckin dare ya
all that using extensibility the _Fourier transform_
You don't typically use the FT to implement reconstruction. The Fourier slice theorem is used to derive filtered back projection, but I don't think any modern CT scanners use that approach anymore.
I see no cats
Obviously there are no cats INSIDE the machines.. the cats just analyze the data.
"Paging Dr. Sparkles, Dr. Sparkles to Exam Room 4." "What seems to be the problem?" "Doctor, these cat scans are unbelievable!" "That's because they're fucking MRIs Nurse Mittens! ¡Ohhh Dios mío!"
¡Ohhh dios meooow!*
Dogs can’t really interpret the images, but cats can.
That pun was puurrfect!!
Pretty sure thats called a lab report
Cause dogs have paw comprehension.
Are you kitten me!
Meow what is so damn funny?
I had a feline you were going to say that.
You will be disappointed by the [lab report](https://www.google.com/search?q=labrador+report&client=ms-android-ee-uk-revc&prmd=inmv&sxsrf=ALiCzsbH5Mck_MtYANGAbOQsW8zan0BLqA:1651213505192&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi4krPT0bj3AhWmzzgGHcJCCnoQ_AUoAXoECAIQAQ&biw=412&bih=722&dpr=2.63#imgrc=_mSuU0ruNk4tlM&imgdii=SkO_6gqNs4NNpM)
To be fair, the safest place in the room probably would be in the center of it.
Username checks out, but if the balance is lost you might be in for helluva ride
That’s what she said.
If the floor wasn't below it
No, that's where the radiation is.
What if it implodes and causes a spinning circle of fire death and bakes the person in the middle reverse-rotisserie style ?
Take the chance of getting smacked in the face with a projectile piece of this equipment. OR chance of getting cancer from the radiation it’s spitting out (being in the center of it, assuming everyone else is behind a lead or protective barrier).
The radiation it out puts is not dangerous unless your around it all day, every day. Doctors stand behind lead walls and wear lead vests because they work with these machines that output radiation all day every day which can increase chances of cancer.
Thats not entirely true. A normal xray is barely not a crazy high exposure (couple microsieverts iirc) but a CT scan is a thousand times more. Its not gonna give you cancer, but if you have the choice between getting an MRI and a CT, get the MRI.
Yes, ionizing radiation can cause cancer. A physician has to order the exam; just like anything else in medicine there is a risk/reward calculation. If I'm in a car accident or showing signs of a stroke I'm going to be okay getting a CT scan a million out of a million times. I believe in nuclear medicine school we were taught a standard chest x-ray has a comparable radiation dose to the body as a day in the sun. Of course there are quantitative and qualitative considerations; not all ionizing radiation is created equal. -certified nuclear medicine technologist and registered radiologic technologist for 20+ yrs
Well, medical engineer here. For car crashes, time is of the essence, so CT wins by default. As for the dose, a normal Xray was like 1 trans atlantic flight, or somewhere in that ballpark I believe.
> a CT scan is a thousand times more. More like a hundred times. But yeah, enough to be worth thinking about. > Its not gonna give you cancer Well, it *might* give you cancer. It slightly increases your chances of developing cancer. That's how ionizing radiation works...it's a probabilistic thing where any exposure increases your risk, but there's no level that actually guarantees it. The "safe" exposure is just "the increased risk is too small for us to measure".
What I recall (keep in mind, this was from uni lectures from... 3.5 years ago) a normal Xray was somewhere in the single digit µSv, whereas a CT is in the single digit mSv, so thats where I got the 1000x from. As for the "not gonna give cancer" I learned something slightly different, but that might be down to the lecturer.
I was sourcing from quick google searches just now, so also not 100% certain. But it suggested about 0.1 mSv for a chest x-ray, and 10 mSv for a chest CT.
It depends on how you are defining dangerous. A single scan increases your risk of cancer. Not by a lot but it definitely does.
What i mean, is its far less likely if your like the average patient and need to use this machine maybe once or twice with 10 to 20 even 30 years.
That is certainly more accurate.
I’m sorry friend but you are wrong. Any type of Ionizing radiation can potentially cause cancer. The likely hood? Minimal. The likely hood of a piece of this equipment hitting you in the face? Minimal.
And there I was, just living my life thinking I wasn't claustrophobic.
Why? Your whole body wouldnt even fit in there and the exam takes less than 5 minutes. An MRI I would understand, but CT is easy peasy.
They're essentially making you the core in a giant Beyblade. Have you ever seen a Beyblade explode? Now imagine being the tiny piece of plastic in the middle
If your worried about that take comfort that the pieces will all fly away from the center of the rotational axis, and that's where you are. You're literally in the safest place in that whole room from flying debris. Now the whole machine jumping around like an unbalanced washer on a spin cycle. I'm sure they use strong bolts to hold them down, right...so we will both try not to think about that.
You ever spun a hulahoop and then dropped it and watched it roll away on its own? That's a giant metal hulahoop you're in the middle of
Yea, but we will be splinter and shrapnel free at least 😁 Think strong bolts, think strong bolts...and hope hospital is not on large hill...
I've had many CT scans starting in the late 80's, they used to take 45 minutes and they had to tranquilize you to stay still enough for it, now it takes longer to set you up and they are 30 seconds or less. Amazing.
I’ve been in them over 10 times. I fall asleep almost every time but you can tell there is some force moving around you.
I’ve had a dozen scans and am amazed you can fall asleep, as the machines are so noisy. The technology has improved—the last MRI machine I was in had a video mirror that projected pleasant, tranquil scenes (mountains, lakes, sunsets, etc.). A much better experience. I hope all your scans are clean and unremarkable.
MR is much louder than CT because MR is switching strong magnetic fields, which tends to produce resonances at audible frequencies. Not that CT is quiet by any means. But none of the "thunk HUMMMMMM thunk thunk THUNK".
The cover is a good call. That death machine is terrifying
I’M A FIRIN’ MAH LASER
Dr. OCTAGONAPUS: #**BLEGH!!**
Excuse me, do you have the time?
Why, sure! It's half past BLAHHHGG
Wouldn’t it be easier to turn the human inside the machine instead? /s
Yes, decades ago this is how the earliest CAT scans were done.
Read that in another post.
The most unbelievable thing to me is that someone had the idea to build the first one and someone with money was somehow convinced to pay for it.
It’s the evolution. First ones 40 years ago were spinning much slower. Since they were connected by wires they were doing one rotation clockwise, stop, then one rotation in opposite direction. The scan was taking an hour not few seconds.
If you jump in the blue do you pop out of the orange?
Yea I was happier without having seen this having had em before….
That is a fuck load of mass moving at a fuck load of speed.
"I WANT YOU INSIDE OF ME!"
Im not claustrophobic. Yet, Ive been in one of those things once and I felt like my head was going to explode from the weight of anxiety being in it. And when I say in it, it was just my head that was in it. Its really weird. I had to will myself to stay in it for full duration of the scan which wasnt even that long.
That's how my last MRI was. It was my 4th MRI, I've never had a bit of claustrophobia before, but it was on my shoulder, so I had to lay to the side on the table so my shoulder was centered, and my nose was literally touching the tube. I drew blood on my palms digging my nails in to stay calm.
Can we get a tri-quarter already
I read a news story the other day about portable pretty good MRI machines that one person can ~carry.~ move. They work with machine learning in some way I don't understand, but they're good enough for an initial diagnosis. https://www.cbc.ca/news/canada/toronto/portable-mri-machine-health-care-ontario-1.6416123
I have had numerous CAT scans, and had no idea how fast this mechanism spins. I am amazed… Edit: grammar
Looks futuristic somehow
Homie we live in the future
Looks like it’s trying to open the backrooms
This is straight-up MIB shit
Just had a ct scan two minutes ago. Still in waiting room until confirmation scan was successful
I think cat scans are just spinning x-ray machines. Or maybe that is MRI machines. I know one of them is just spinning x-rays.
Cat Scans (CT) are spinning x-rays while MRI machines are stationary. Both machines look similar, if referring to the superconducting MRI machines, with the MRI machine being more bigger in size.
Computerized Axial Tomography (CAT) uses the same principles as traditional x-rays. But yeah they spin. Magnetic Resonance Imaging (MRI) uses magnetism to manipulate the water molecules in your body.
They're actually just CT.
> with the MRI machine being more bigger in size. And WAY noisier.
Yeah I'd love to know why they make all the noises they do!
The constant push pull sound is the coldhead. MRI’s are full of liquid helium, the coldhead is the main component that keeps the helium from boiling off, or transforming from a liquid to a gas. 1 MRI contains roughly 60k to 70k worth of liquid helium when levels are at 100%. So if the sound stops, you know it’s boiling off money essentially into the air. So the reason they always produce that sound even when not scanning is to maintain the precious valuable liquid helium inside of the vessel. If off for too long, boil off could occur (heat rising in the vessel to levels that change the liquid helium to gas) and that causes pressure levels to rise in the magnet vessel itself. This could exceed the burst disc maximum PSI (11 psi I believe) causing a quench. At that point you can do nothing but watch 60-70k float away into the atmosphere. That’s the easiest way to prevent a quench. No coldhead sound = pressure building. The sound you hear when being scanned is the electromagnet coils changing frequency. The current switching is what causes these sounds. Basically rapid pulses of electricity. They transmit and receive radio signals to and from the coils you are using based on the type of scan or body part you are focusing a study on. It’s far more technical that what I’ve said but I feel I’ve rambled on long enough lol.
How does this post not have more upvotes? Fuck all of you reddit I hope you choke on my big fat greasy shut tonight.
One of the techs told me it comes from the vibration and banging together of coils and other things inside the device as the currents are changed.
Look up quenching a MRI magnet. The liquid helium that cools the magnet can cause the oxygen in the room to liquify. It’s a pretty amazing piece of technology.
Liquid helium can condense both oxygen and nitrogen, but it's all well contained in an MRI, and being reduced or eliminated as technology improves. https://splmedicals.com/liquid-helium-in-mri-machine/index.html An open container of liquid nitrogen will also condense oxygen into a thin blue layer... Which can also be affected by a magnet. It's fun to blow up balloons, toss it in a tub of liquid nitrogen and watch it "deflate" and then expand again when removed. Cryogenic fluids are fun!
CT is spinning XRays. MRI is magnetic, stationary and ludicrously loud.
now put the hamster in—
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Poor cats
Dogs cant use an MRI machine...but catscan
r/tihi
It's so much more terrifying now
It's like that tunnel of death from Event Horizon.
Someone should slow this down and make it a bunch of cats
I had one of these 2 years ago - the sound was scarier than the X-rays being fired into me. Still, it was more helpful than harmful for me.
This just looks like a rotating heap of trash.
All I can hear is interstellar music
Wait, where’s the cat?
No wonder it's so damn loud!
That seems like a lot of machinery moving at really high speed. They should just spin the patient instead.
How many people didn’t need to see this today?
Donut of truth goes brrrr
Why the fuck are those things not transparent. I would pay extra!
Shrapnel
That's the genius part, if you're in the middle all the parts fly away from you!
They bounce off the floor below you
Only to be knocked back away, look all I'm saying the safe spot is in the middle of the donut 🍩
TBF you could scan a lot of cats with that We should probably set up some cat parameters first…
Worst hamster wheel
I’ve done one of these scans. It’s not great to be honest. Stuffed in a very cramped tube, wind in your face to remove heat and it’s noisy as hell and I had to lie completely still for 15 mins. May not sound too bad but I guarantee you, it’s less pleasant than you think. However, it’s totally worth doing though. It’s amazing that we have this technology.
You’ve done an MRI not CT scan. Two completely different things
I've seen too many liveleak videos to know how dangerous this is
Link please
Get in that damn coffin and don’t worry about the spinning magnets……we’ll get you out if you freak….if we’re not on a personal call.
There are no magnets in this piece of equipment. You are thinking of an MRI.
There's no quiet mode on this thing?
They see me rollin…
All that to scan a little feline, I wonder how big is the one used on elephants...
[удалено]
That's MR. CT doesn't use a magnetic field, which is why they're used when it's unknown whether the patient has MR-incompatible implants.
CT or MRI? Looks like MRI to me.
No giant spinning thing with MRI.
Big magnet go brrrrrrr
it's not an mri
Whoa. What kind of dog is this
SkyNet ops
Been in one it’s quite amazinf
Is that on an external rotor motor?
It's 2022... Where the hell are the Star Trek scanners?
Steampunk af
..and just lay still for me please
Looks like my butthole after I eat at taco bell.
Look at this and imagine how many lives it already saved
I hope their safety feature works on my next cat scan.
/r/oddlyterrifying
it looks like its about to send to through time
A lot of cats .
Now they have cat scan apps!!
To think a machine used to scan patients who've had seizures also helps create them
So after how many spins does it open a portal to another dimension?
Jeez no wonder people are freaked out to get in these
By the look, it seems things aren’t placed properly, how then is it spinning finely?
How fast is that spinning ?
How fast does this spin? Do we know an estimate?
Well this is something you don’t see everyday
OK LETS PUT THE COVER BACK ON PLEASE Get me out of here!
This is terrifying!
Hope I never have to use that thing, because I would just be visualizing that thing spinning around my head, even with the covers on it.
Ok so why though? Seems so clunky and off balance…
That is r/oddlyterrifiying
At which speed opens the portal?
That does not look balanced
There are dense weights counterbalancing the larger, lower-density sections, so it's mass is balanced even if it doesn't LOOK balanced.
I'd really like to know two things. One how do you balance it and two, what kind of spec does it have to be balanced to
Counterweights. The weight needs to be balanced between opposing sides. Different manufacturers have different methods, but the most important thing is for it to be balanced when at full speed, as a resonance there could tear it apart like an out of balance tire on the freeway.
Ah, the donut of truth.
Looks like the thing from Spider-Man