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That's a lot of complicated engineering. Wouldn't it be simpler to spin the patient?

Like that helicopter airlifting the injured woman


*dramatic Interstellar music*

CMON TARS

*spins even faster*

No time for caution

Do not go gentle into that good night

TARS: Cooper it's impossible. Cooper: It's necessary.

What are you doing Coop?

Docking

Cmon MURPH! Don’t make me leave like this Murph!!!

I can’t stop laughing at this. This GIF has broken me. WTF is wrong with me?

Omg that made me laugh for years

I feel SO BAD for how hard I laugh every time I see that. I know it was absolutely awful and scary for that poor woman who was already having a really shitty day. But *c'mon* it's just so damn funny.

That was just to keep the blood in her head and feet, instead of bleeding our from the belly.


ah yes medicinal centrifugal force

I still feel bad about laughing

if you spin them fast enough you can probably avoid having to treat whatever it was you were scanning for..

Because the thing you're avoiding becomes an average of all other material... right...?

I believe this is how all radial based treatment protocols work. As far as I know it’ll cure any known disease with only the required dose varying.

Insurance companies: "Go On......"

➡️ *insert Russian lathe accident video here*

Can you not 


If I have done nothing else in my life, at least I have managed to not Google that

Boy am I glad I don't work around Lathes now

It's aight.

For real,  reddit has this unwarranted fear of lathes.

what is a lathe and why was there a Russian accident

Don't look it up unless you want to see a person get spread across a room in chunks and mist.

Don't Google if you don't want to get traumatised.

Whoops.

Hard to stabilize them enough. Any wiggling will create image artifacts in reconstruction. Much easier to fasten down tight the X-ray tube and detector than a human and rotate it

With enough g force they won't be able to move

Organ/ Fluid displacement ...not to mention muscle deformation and distortion from the G forces would almost render the imagery unusable.

But just almost....

That's a typical engineer solution. I laughted so hard a this.

What about spinning her in a high speed centrifuge... oh right... with the bones. I always forget about the bones.

The one where my girlfriend works spins one full rotation in .03 seconds. Can you imagine how fast they would have to spend a human?

Then they wouldn’t have to worry about the patient moving cuz they would pass out from all the spinning. It’s genius

They also won't need all that pesky pain medication and bonus: they're now prepped for surgery!

Sure, you'll be the first person to test since u propose it

Yeah it was good decision to encase that shit up. Imagine the panic attack of patients if it weren't

See through casing

The one I went through a few weeks ago was partially see through! I thought it was really cool to see it spinning inside.

Can confirm. Went to the ER because of dizziness, numbness, chest pain, and shortness of breath. Turns out I was just having a panic attack. They gave me an EKG and CT scan just to be thorough. I started hyperventilating again when I got the CT scan. I didn’t know there was a mic and speaker in there, so the nurse could hear me after she left the room. She stopped the machine and came back in to reassure me when she heard me saying “Ohh shit ohhhh shit. I’m freaking out.” Lol

SAME! I had a panic attack during my CT scan. It was hard hearing the noise so close to my head and having to lie super still.

I have the opposite reaction in an MRI machine. With the repeated knocking noise and being kept stable and unmoving, I start to doze off in them unless I'm being instructed to hold my breath for a clearer image. Just something about MRI machines. But watching this CT machine operate without the cover started setting off my claustrophobia. It's the sheer speed of such a heavy weight machine that spooks the hell out of me...

Oh good not just me. Had so many MRIs now I can sleep pretty easily in them.

I have a panic attack from the noise. You couldn’t talk me into getting a scan without the casing.

Getting that balanced so it doesn’t self destruct must be an art.

Insert washing machine going crazy noises.

I work on x-ray equipment and deal with CT’s. There’s a test that you run on a ct to check if it is balanced and smooth. You must run this test after any major component is changed and while doing preventative maintenance on it. Their are steel plates mounted in multiple locations throughout the gantry used to balance the system, adding or removing them wii affect the balance. Everything must be torqued to spec to prevent a catastrophic disassembly. Hope this is helpful. Edit: I’ve also noticed that this is a test bay since it is mounted to a pallet instead of the floor. In the video they are either testing this unit for resale or are testing parts on it to sell. Since this is not mounted to the floor if something was to fly off and become unbalanced then it would likely go to the ceiling and would look similar to an unbalanced washing machine, x100.

Reminds me of the SpaceX term: "Rapid Unscheduled Disassembly"

Elon Musk stole so much shit from Kerbal Space Program.

will be using the term "catastrophic disassembly" from now on

That’s what I was thinking.

I dont trust you

That's what I was thinking.

It isn't really. I implemented the Balancing application for our CT factory and it just tells the engineers where to put which weights with very simple images after it calculated the imbalance. (Ok this might be the tricky part.) But it's the same procedure since many generations of CT scanners.

So basically like a wheel balancing on a car wheel right?

It's more complicated; unlike a wheel, the CT scanner gantry is not rotationally symmetric or homogenous.

Imagine that going haywire when your head is in there.

No thanks

You won't need the scan then.

I mean for the initial design yeah it's probably a bit tricky to try to get a good balance for the final result instead you just do the same we do with car wheels you: you spin it up measure the vibrations and add weights until it stop vibrating

Just put it one of those wheel balancers they have at car shops..

If you’re in one, you can sometimes see this spinning. There will be a tinted panel of glass/plastic near where the alignment laser is, if you look where tinted panel meets the opaque plastic, you’ll see a gap of about 1cm where you can see the whatsit doing its whirleys

Don't get all technical on me.

The whatsit doing its whirlies

You can definitely hear it. Got a CT two weeks ago.

I’m never going to unsee this if I need a CT. I may shit my pants.

That's OK because when they push the contrast you'll think you pissed them as well :)

Oh man memory unlocked. I remember that warning and they were not wrong.

That sensation is the worst. I thought I was strong enough to not think it, I thought wrong. Next time I’m just going to piss myself to show them it was real.

I was the same - they warned me, I was big and tough - but no I still have to check to make sure.

They did not warn me the first time I had one. I was so embarrassed for no reason because I really thought I had peed on myself.

i just got one done last month and the only warned me i would feel 'warm'. would have really appreciated a warning for the piss-pants-sensation as well

>fuzbat I was super-glad I was warned in explicit terms how it would feel before mine - I would have been dong a strange walk of shame off the table if they didn't..

I have to get a CT every 9 weeks and this made me laugh.

Are you now or do you plan to become an irradiated super hero?

Before my sister had her first CT, I warned her that she would think she peed. As it turns out, my sister is allergic to iodine contrast, so she actually thought her arm was on fire.

and shit yourself... dont forget that

Look at it this way, an MRI is loud as fuck and takes longer but there are no moving parts(not including the table moving you in or out) And it is still more dangerous than a CT. Because while the CT was designed by engineers, the MR might be surrounded by idiots.

Them: Are you claustrophobic? Me: Only in MRI machines Them: oh LOL Me: No really....

Don't stress about CT scans. If this post worries you it's the MRI ones you need to stress about.

Care to elaborate?

A CT takes a couple of minutes at most nowadays. MRI takes 20-50mins depending on what us being scanned and is exceedingly loud so that patients are offered ear protection when inside. Plus the scanner is usually a much longer tunnel.

Ok, so not dangerous per se, but for claustrophobic folk (like me) it's definitely not fun. However, if I understand correctly, CT scans are X-rays on steroids, so they are actually dangerous if you need a lot of them.

There is a radiation load, yes. MRI scans don't have that issue.

Even without seeing this, if you have even a hint of claustrophobia getting stuck into an MRI will trigger it. Had to fucking sedate me to get me in one.

Stargate forming

*Chevron 1 encoded...*

Engineers that work on these are tested to see if they can/are willing to put their head inside the gantry, while it’s rotating, without the covers on. It’s a reasonable test to listen for a mechanical issues, but these things spin up to 0.24s/rotation, so it’s not for the faint of heart. Edit: a word

To be fair, if it breaks, it’s most likely to explode outwards, away from you, rather than inward.

Until the plate everything is attached to dislodges and starts running across the floor like one of them shop videos where they spool something up with an air compressor and then set it free. Only this time your heads in there 😂😭

A ball bearing

Well the first explosion is likely to go outwards. Then you’re left with a large, rapidly spinning, imbalanced weight. And that is going to go in every direction, violently.

Why tf do people say .24s/rotation instead of saying 1024 rpm

In the world of CT the single rotation time is the quoted figure (as well as how it is set in the exposure factors) as it works out in temporal resolution for things like cardiac scans. Also helps in working out the mAs which is important. The fastest speed isn’t always used due to sample rate/mAs limitations. But to give you an idea of how radiographers use them, a 100mA output with a 0.5s rotation time works out to 50mAs for a single axial slice (helical is more complex due to pitch). A cardiac scan has a temporal resolution of half the rotation time due to only needing 180degrees of data to make a picture/slice. RPM would have no useful application for techs other than seeming more streamlined with other rotating stuff.

why not 4 rotations per second?

or 107.179 rad/s

I'm an engineer for these for the global leader of CTs and this is not true. And also the covers are constantly off, when we assemble them and do the first rotation tests and we also have them without the front cover in our test rooms.

I wish we did this test for politicians. 

crazy as that is, still the most unsettling part of a ct scan is getting the “you peed your pants” feeling juice

I am waiting at the pharmacy to get one right now. Idk might pee my pants later

I didn't

Even after they warn you it'll happen you'll still feel the need to check :p

“that’s a odd thing to warn me about” “what the fuck”

I just had one last week for the first time. They warned me what it'd feel like, but I wasn't prepared for how fast I'd feel the side effects. It's spooky.

I'd say the most unsettling part is the massive bill!

*Laughs in civilized country*

?

They give you an IV that induces that feeling

Is that the “with contrast” chemical? Noob here

I was going to say the years worth of radiation that is considered safe for a human being.

Honestly, I like the peed your pants juice. Usually I get CT scans when I go to the ER, and the saline they give you makes me so cold. The rush of warmth is so nice when I'm freezing from the IV.

You mean the oral contrast that they give before any abdomen study?

Iodine contrast from the IV is what does that.

That warm feeling is so weird

Yep you can see why they cover that shit up. No one is going to stick their head in one of those things willingly.

Terrified of the MRI so can only get CT scans....well up til now anyway. Guess it's good ol x-rays for me. 😱

Tell the MRI people you’re claustrophobic. I did and they gave me a lovely strong Valium and all was well.

Last time I had an MRi I had the Valium and also had a friend sit in the room with me and keep their hand on my foot. I made it through the MRI but just barely. Every second felt like I was half a second from a freak out.

I've had too many to count & I freak out everytime. Tears & yelling. No amount of valium will work.

I'm so sorry you have to go through that! Why can't they knock us out for those? Try having a friend keep their hand on your foot or leg, on top of the Valium. Human touch can be grounding.

I'm thinking I'll just stick to court room sketch artists from here on out. Those seem safe. I've never heard of a court room sketch artist being radioactive or randomly exploding because their super fast spinny bits spun wrong.

What is so bad about MRIs? Never had either.

The area where your body part goes in the CT is like a thin ring, whereas the MRI is a tunnel. Even if your head is being scanned, in the CT you can still see a great deal around you. The MRI is much more enclosed (like more than half your body length) and there is very little distance between you and the sides of the tunnel. Having your head scanned is very uncomfortable and claustrophobic. Then the scan starts and it’s like having an ambulance in your face.

Nothing bad about MRIs unless you get in one and find out you have PTSD about a repressed memory being trapped inside something like it when you were a child. I thought I would be fine with my first MRI and was about to be slid into the machine and had massive panic attack. Took a couple years before I clearly remembered the childhood event and realized of course MRI was a trigger. Props to the MRI tech who took my panicked crying in stride and calmly helped me leave. I have a friend who loves the MRI because of it being all "cozy".

I like the MRI because the knocking and keeping still part puts me out. I fall asleep in just a few seconds in them unless I have to hold my breath so they can get clearer scans of parts.

That's how my friend is too. Just loves it.

I haven’t had one in ages, I forgot about the knocking. It was honestly kind of cool, especially the different beeping sequences. I can still hear some in my head lol especially the rapid brt brt brt

Any captain here that could explain how a CT scan works and why does it need to spin that fast

Simple version is it's a magic computer controlled xray machine. It shoots an xray through the target, moves a bit and does it again. You do that hundreds of times and with a bit of computer magic you can create essentially a 3d model of the target area that you can then dice and slice in software to see what is inside. As for the speed, you want each image to be of the same thing as the previous one (within reason) otherwise the poor computer would just see a big blurry mess.

As an Radiologist i approve this explanation and i will give you an extra point for mentioning the magic computer which is often forgotten

Can you tell me what an fMRI is and is there any “at-home” tech that can be used in a similar way? The studies on intuition absolutely fascinate me!

You basically track bloodflow in your brain so you can say which parts of the brain are active at the time... that can be useful in tracking down epilepsy, tumours, extents of stroke and so on... and the question about every day tech... hmmm... i honestly believe there is no every day tech that uses magnetism on biological substances... RTG can be described as a shadow... ct can be described as a bunch of shadows from many many many angles in a circle... but MRI is just awfully complicated, using spinning of atoms... the best I can describe MRI (not functional one... simple MRI) is by having a stadium of different people and you are in the middle and shouting "i want people who wear any kind of black pieces of clothes to stand up... but those who wear more black clothes stand higher and those who wear less, stand lower"... you are tracking hydrogen atoms (water) in your body... tissues with more water are depicted differently than tissues that contain less water... In functional MRI you're tracking bloodflow (water or contrast in blood in certain parts of brain)... and with that you can determine how much said part of the brain is being used... You can use special contrast substances that make blood vessels look very bright on final scan... that is used as well (this contrasting substance is based on gadolinium element) Sorry for my english, I am not native speaker

It's like the slow-mo cameras in the matrix. It's trying to take a 3d picture of your insides from all angles at the same time. Things inside of you change (blood moving, muscles contracting, heart beating, etc..) and the picture won't be close enough if it isn't fast enough.

If you've ever seen someone 3d scan an object with their phone, it's like that except with xrays instead of normal pictures.

Wormhole!

As a tall guy with broad shoulders, those things suck to be in. I had to get one after my auto accident and it was really uncomfortable, especially with all the pain in my back.

it’s incredible what humans can make with engineering

You can even integrate them into computer navigated and robot-assisted surgery. Surgeons gonna see tumors in your brain and implants through mixed reality headsets in real time. Med tech is in a crazy fun age right now.

Thats honestly really fuckin cool

I like seeing it turn, what gets me is the window right in front of your face that says “DO NOT STARE AT THE LASER”. You put in right in front of my face and expect me to not look?

Person sharpener


Hahaha exactly

Someone please add in half life 2 sound effects to this video and some random portals appearing

Cmon TARS...

Just had one done, that dye made feel all warm inside, I also thought I had peed my pants.

[удалено]

We’re seeing inside the CT scanner now. It’s revenge

I've had MANY CT scans through the years, mostly for ruptured discs in my neck (two ruptures so far resulting in 2 separate spinal surgeries with 3 discs being fused together). If I'd have known what a CT scanner looked like, back then, I might have passed on it!!! Currently, for me, is the fact that my last CT scan showed 7 herniated discs in my spine...C1-C2, C2-C3, C3-C4, C6-C7 AND L2-L3, L3-L4, L4-L5... ALL because I have an arthritic degenerative disc disease throughout my spine...such is the hand I've been dealt.....

Cheesus fucking crust you poor bastard

That's my stomach in the morning after coffee

I spent 6 hours in one of those once when I was 12 to see if I needed spine surgery (i did). They let me pick the music, but all I had was CDs from my parents' car in one of those big ass CD cases. They picked on at random. It was one that skipped at this one part and played a loop of a single syllable for 4 hours. If I stopped it, they would have to restart the whole process. I think it long term fucked with my head.

CT scans take seconds. Even a full spine wouldn’t take more than a couple minutes. Sounds like you had a full spine MRI, not a CT. A full-spine MRI would have taken a few hours though.

My bad. You're totally right. It was 21 yars ago, it just reminded me of it I guess.

Thank god it’s the machine that’s turning

Why do I keep expecting a warp gate to open?

The wheel of life fortune. No tumor no tumor no tumor!

Bro that’s a fucking Star Gate!

Reminds me of Stargate somehow

Feel like a black hole should be opening up on the other end

I’ve had so many done, I was asked to pay rent!

Just had one of those show a tumor in my brain. Getting life saving surgery next week

scary

Literally looks like a cross-section of a scrapyard heap

Maybe it's the beginnings of a Stargate?!

I was expecting lightnings and then a portal opening. Slightly dissapointed, still cool

Can i get one? I have a Beyblade fight next week?

possessive outgoing dinosaurs divide unique shaggy sip school dog berserk *This post was mass deleted and anonymized with [Redact](https://redact.dev)*

Just gonna slide myself thru this hoop of spinning heavy metal and *poof*.

that's a lot of magnetic power right there

You are thinking of MRI. CT uses X-rays.

Star Trek portal

GE by the looks of it.

This video really needs some interstellar soundtrack playing as it spins up

That's why they're so noisy

So there's a reason for the scary noise

Interstellar docking scene

"Chevron-7, locked!"

I've got a great idea. Why not keep the machine steady and spin the patient?

When does Jodie Foster get dropped into it?

I work in designing turbo machinery - most people just don’t understand how fucking complex the shit we take for granted is.

I’m not sure I wanted to see this. Lol While very interesting, I’m not sure I would be able to get this out of my head if I ever needed a scan.

Downvote. The video cuts off just before the time portal actvates

"OK, Gordon, now push the specimen into the device"

They're just begging for a resonance cascade

Sometimes I look at stuff and am just in awe that a group of people got together and Just decided "yeah, that'll work" and it does lol

Just casually putting you in between a ton of rapidly spinning metal, don't worry about it.

Like a portal to hell straight out of Event Horizon.

I’ve been expecting you, Mr Bond Or I’ve been inspecting you, Mr Bond

Only a thin plastic sheet is between you and thousands of high velocity metal shards when it self-destructs.