MRI Upgrade Timelapse - Two Weeks in 4 minutes

[@roadwolf2]

I love how you can upgrade the machine without having to change the core unit.

[@johnryu9385]

Cause it is interchangable with the New one so they dont bother to use a New Core system

[@Ian-pe9rj]

The core part is mostly the magnet, it should be just as effective as a new one. Plus they’d have a hell of a time removing that iron core it would weigh tons!

[@llary]

More upgradeable than an Apple Macbook

[@roadwolf2]

llary and probably cost less to upgrade too

[@KallePihlajasaari]

@@Ian-pe9rj The magnet is mostly superconducting wire in a massive vacuum insulating dewar (thermos) and is a decent part of the cost. The more prosaic reason for upgrade may often be that it is too expensive to extract the magnet from the facility that may have had renovations around it that prevent it leaving the building without cutting holes in walls. It is impressive that they full support upgrades though.

[@BarneySaysHi]

I never realized a MRI scanner was THAT heavy! I think it's fascinating technology!

[@martinsoendergaard-jensen9602]

I know right? It's terrifying. Claustrophobic as hell.

[@leemilica]

Never knew the coil was a piece that could be removed...

[@richb7414]

@@leemilica Bore, not coil. The coils are outside the core unit and have NOT been upgraded here. The coils are being re-used as they have the windings to provide the same 3T field as the upgraded unit.

[@eli55121]

fascinating to see but not to feel...

[@Chopper153]

@@leemilica The coils are superconducting during operation, so no upgradation is required. However the core needs to be upgraded to prevent from saturation.

[@cooliocrib4409]

I designed the electronics on this MRI magnet. But this is nothing compared to the one I'm currently working on. Proud to say the least 😃

[@stijn2472]

Sounds awesome!

[@markhodgson2348]

Modulate the frequency and transmit

[@naturesounds9650]

Please I want to know more about the MRI electronic. Could you please recommend me some books ? Regards Here is my email. [e-mail]

[@ZacharyCordova]

I would never have expected to find the designer in the comments section here. That’s awesome!

[@RandomTheories]

more wires!

[@johnabbottphotography]

This was fun! When I first researched MRIs to try to understand the technology, I was blown away by the different fields that it encompases, and how it all works together. There is *so* much going on behind that plastic cover, that its difficult to comprehend. Thanks for the timelapse. If you ever do one of these again, I'd love to record the process.

[@83joonior]

Very impressive. We only see a plastic machine that makes a whirl sound. It scares me a bit, to know that there's a gigantic magnet wheel spinning very very fast around my head haha. Big respect to you and the other engineers.

[@cookiecatification]

This sort of thing has a name: it's called engineering porn.

[@TheDivergentDrummer]

www.reddit.com/r/EngineeringPorn/ Ur welcome ;)

[@stevmwangombe1174]

no

[@kostas_sia]

:DDD

[@kingskiller1253]

Same man🤣😂

[@fincrazydragon]

And I just had a nerdgasm! 😂

[@jeffreyfessler]

Oh wait, where was this extra bolt supposed to go again?

[@LumaControl]

Let the bolt go.... nothing will happen.... kzbin.info/www/bejne/a6uWZI2ZecyUrLsm49s

[@leemilica]

PC GUY 1241 lol nice one... but I think the helium release bolt is a bit too big to miss...

[@LumaControl]

Yes... Is it a bolt by the way? not a valve?

[@ohaider123]

What bolt, I have noooo idea what you're talking about

[@Guelicious]

if you didn't need the bolt, than you actually upgraded the design of the machine. xD

[@chemicle]

Seeing how sophisticated these machines are, it's easy to see why they are so expensive. it literally takes a team...... wow.

[@robertcarlton1045]

Now the upgrade is done with a team of 2. And ramped and calibrated by one

[@boblordylordyhowie]

What most people don't realise is the room itself is a piece of technology as you are in a copper box that has to screen out any interference, I used to install them for Lindgren. I went to the first as an electrician to install some lighting and found four bricks walls, a concrete roof with a great hole in it, two weeks later it was a fully functioning MRI suite. During that time I learned how to level a concrete floor, cover it with epoxy resin, lay copper sheeting, build walls with plasterboard, suspend a ceiling and finally seal the room with the MRI in it.

[@b.baggins8893]

Thanks for sharing! Been a CT Scanner Field service Engineer myself to do lots of FCOs. Sometimes Problems only show when finished, like that only some X-ray Tubes been compatible with the latest Beryllium Oxyd Detectors. But Problems disappear rapidly right after doing the right thing!

[@peterking2794]

I'm fascinated by this sort of stuff. I had an MRI scan a couple of months ago of my prostate. I was quite looking forwards to going into the machine and hearing the sounds through the ear defenders. Considering the strength of the magnet, it amazes me that the machine can contain ferrous metals, but doesn't tear itself apart! Thank you for the video and info.

[@skraminc]

stainless steel laughs at magnets.

[@bengt_axle]

I was a student at UIUC in the late 90s and remember them having to make a hole in the wall of Beckmann to get the original unit in. It was actually reported in the local newspapers. However, like many others, we never got to see the scanner and its installation.

[@roberttuck4768]

KZbin has introduced me to the world of MRI scanner innards and decided I want to watch a lot of videos about them

[@electronics-girl]

Wow, I had no idea they did medical research at the Beckman Institute. Really, I know very little about the Beckman Institute. When I was a computer science student at UIUC in the late '90s, there was an urban legend (or at least I hope now that it wasn't literally true) that there were armed guards at the Beckman and that if you went wandering around alone you might get shot. So I steered clear of the Beckman. The only time I ever went inside the building was on a guided tour that went to see the CAVE. And I have to say, the CAVE was one of the most impressive things I had ever seen!

[@Big_ol_bass]

They watch the tunnel's too.

[@litarea]

What is the CAVE?

[@electronics-girl]

@@litarea I can't find what the acronym stood for, but it was a virtual reality system originally developed at UIC in 1991, and one also existed at the Beckman Institute at UIUC from 1995-2017. It was a smallish cube-shaped room that could hold maybe 10 people or so if they huddled close together. There were projectors on the walls and the floor, driven by a bank of SGI workstations. In the '90s, it was a mind-blowing experience, but these days it's probably been made obsolete by virtual reality headsets.

[@funkle2012]

MR tech is incredible. Changed diagnostics so much. The person that can make these scans cost less than $200 will be a billionaire overnight.

[@Finezzato]

that's insane tech that we take for granted

[@3ffrige]

These machines are absolutely amazing and a literal life saver. Want to get one or two for the house so we don’t have to go all the way to the hospital to get scanned

[@robertcarlton1045]

Nothing is more daunting than day one of the upgrade . Or more rewarding than the last day and startup and Calibration.

[@elhugeo]

Wish I had 1 of these in my living room. Test myself for tumors before driving to work & shit...

[@jannoottenburghs5121]

You can buy a cheap one for just a million on a Chinses amazon according to my professor technology who give courses about technology in medical imaging

[@MariusMerchiers]

Maybe look on aliexpress. Free delivery 😜

[@poppypeppa0186]

i know a cool website where you can buy used mri’s for under 250k bucks have fun with scanning yourself but you need someone who presses the start button www.dotmed.com

[@F3n0l1g4]

That would be a MRI selfie, right?

[@martincerveny2284]

Well, you'll still need someone to tell you what is in these images :-D

[@TheWim1977]

That is one hell of a big upgrade 😱💪👍🏻, i saw delivery and assembly of our 3T philips MRI @ our hospital. But this here is a whole other level bro's 👌.

[@markbird1965]

I like many others owe my life to this technology. As an engineer im fascinated to see equipment with the covers removed also. Thanks to all who devellop, maintain and operate such marvels of modern medicine👌

[@nannetishekinah3869]

Sir thank you,but please show us how do u bring and install the magnet

[@BeckmanIllinois]

Here ya go... kzbin.info/www/bejne/Z4u8ZXljebqLeZY

[@ebnyflyer]

Big shout out to the Engineers who designed this marvel of medical life saving equipment, this includes Technicians and maintainers that build, fix and operate it. These are the Unsung and underpaid.

[@75blackviking]

This is really cool. It looks big enough that I could get a few comforters, a duvet, and maybe a couple pillows all in one load. Question is, does the spin cycle get enough water out that I don't have to run it through the dryer twice?

[@ragadoodle]

this isnt a washing machine

[@75blackviking]

@@ragadoodle But if it was, I bet it wouldn't have a "ferrous metals" cycle, right next to the delicates cycle. Maybe a "Create high resolution, cross sectional images of soft tissue using magnetic fields" cycle though. That would be right next to the water level setting.

[@georgf9279]

It's amazing that this kind of upgrade can even be done. I would have thought, that increasing the magnetic flux would mean replacing the whole thing. That said, they replace a whole bunch of stuff. What is it thats beeing kept?

[@KallePihlajasaari]

The magnet is mostly superconducting wire in a massive vacuum insulating dewar (thermos) and is a decent part of the cost.

[@Chopper153]

The coils are being kept as they're superconducting.

[@MyNameIsJeff-W]

Geeez. That seems like lots of work. Imagine building the LHC!

[@JustWasted3HoursHere]

The LHC is probably the most complex device ever constructed by man. Think of the requirements of building an acceleration circle a mile or more in diameter that is precise enough to line up two (or more) subatomic particles for a collision from opposite directions and then measure the directions and velocities of the newly created particles.

[@Chopper153]

@@JustWasted3HoursHere you're correct! It's the most complex structure built by man. I've seen a superconducting cyclotron, it's very complex. Can't imagine how complex the LHC is.

[@JustWasted3HoursHere]

@@Chopper153 It is quite an achievement, no doubt. And there have been very recent physics-shattering (potentially) developments with particle physics: kzbin.info/www/bejne/hWWuoGqEjJesh9E

[@jazcatFL]

It would have been interesting to see the ramp down of the magnet. Of course, that may be because I started in MR back in '85.

[@timprice516]

The cylinder you lay in isn’t called the bore, this refers to the opening of the magnet. In the bore of the magnet are the gradient coil And the body coil which is the bit the patient would lay in. The bore of this 3t magnet is 90cm the size of the body coil 60cm.

[@jazcatFL]

Thank you, I was wondering if anyone else caught that.

[@blendtecbrah5761]

I have one question and one question only; can I play with it?

[@JillianLatorreTS]

14,000Kg (30,864lbs) is the GVWR of an IC RE school bus. It is also the weight of the Mosasaur from Jurassic world.

[@christopherleubner6633]

The "bore" is a big ole electromagnet called the phase gradiant coil. It compensates for irregularities in the static field of the superconducting elecromagnet and emits the RF pulses that make the images on the sense coil. Also they ramped down the field coil and recharged it. The gas cylinders were nitrogen and helium. The LN2 is added first then the helium. They pretty much stripped it to the cold head and the magnet and completely rebuilt it. 😁🤓❤

[@flintthuang]

Is it very expensive to ramp up the super conductive coil? I heard that there is very high chance the ramp up process will fail.

[@jazcatFL]

@@flintthuang a quench, sudden loss of the magnet field, very rarely happens anymore during ramping, the process is mostly automated nowadays. The increased cost is from the increased Helium usage during the ramp. Ramping causes the temperatures inside the magnet to increase which increases burnoff of the Helium.

[@vladimirkuznetsov6233]

Two Dewar flasks are indistinguishable, I think both are helium tanks. I think, they just kept the magnet in cold state, but refilled an inner liquid helium reservoir. If you do precooling with nitrogen, you need to evacuate leftover nitrogen completely to prevent condensation.

[@christopherstory2136]

Interesting to see this as a patient; really appreciate the technology...(and to see it's insides...)

[@calvinhobbes7504]

Very nice video!!!! I wanted to get involved with MRI when I left the military, but I wasn't able to do so .... but I did luck into the nuclear medicine business instead. I never lost my fascination with MRI and how they work however! :)

[@beantown_billy2405]

Looks good. The only thing I would have done differently is wiring the magneto-coupler in an H-bridge configuration instead of phased pulse.

[@adrianpilbrow]

MRI engineering is about as close to magic as any engineering feat.

[@johnmarshall4442]

Interesting , as an A&P mechanic this is state of the art . Were do these technicians come from ?

[@realdevbro447]

Their home?

[@brucemoyers1006]

These machines are usually placed and the building is then built around it. The Univ. of Florida research MRI at their brain institute weighed in excess of 15 tons. They built the building around it.

[@redtieprojects]

it's crazy how much technology has developed. behind these technologies the people who developed them were very smart. some might call it a magic machine. you walk in and you can see your veins.

[@drones7838]

I 100% fall asleep in MRI machines. It drove the techs crazy.

[@curtishollerback1517]

I love front loaders. Where do you put the quarters? 3:28 And for floating frogs. ( really, these things are awesome cool! Intriguing )

[@johnnyb8629]

what sort of commissioning is done after the upgrade? is it something like the test page you print out on your ink jet printer that you put in the scanning bed so your print heads align itself?

[@Zortorond]

There are regular quality assurance testing that being done weekly and monthly with several certainly shaped bottles filled with physio fluid called "phantoms". But after a major change like this there should be done way more extensive testing including the checking and shimming the main field itself as the new coils can couse a "disturbance in the Force" slightly differently than the old ones;)

[@serjfpv1100]

Мне приходиться справляться с такой работой в одиночку или изредка вдвоем. Сегодня запустил philips achieva 1.5t 32 канала.

[@Zortorond]

Бро! Ай фил ё пейн!:)

[@SJR_Media_Group]

*_Hey remember that metallic part that was lost somewhere in the machine during re-build?_*

[@theroyalaustralian]

1:40 It depends on the subway your are referring to in this video, but you'd be incorrect as most subway cars weigh around 20 tons. A motorhome can climb just as high in weight, or heavier depending on how expensive the motorhome is.

[@CoolSteve08]

Do you recover the Helium before working on an MRI like this? Surely there is a way to recover the Helium for upgrades, I can understand venting in emergencies but you'd think it would be possible to recover it under normal circumstances.

[@justintyme2764]

The magnet is ramped down removing the magnetic field thus greatly reducing the helium boil off during the upgrade and eliminating the dangers of high magnetic field. While the magnetic field is down there is still a substantial amount of liquid helium within the magnet that continues to be preserved by the cold head recovery/boil off reduction system.

[@wictimovgovonca320]

For this major upgrade I assume the magnetic field was reduced, hopefully while preserving much of the helium. I am curious however about minor repairs that might involve metallic parts and tools, that would be a challenge.

[@kadirzhanl]

As far as I know, MRI uses electromagnets which means they only magnetised when electricity flows in coils. So when the machine is not operating, there is no magnetic field and repairs with metal tools and parts should not be an issue.

[@TheTerrorJumper]

@@kadirzhanl the magnetic field is always on

[@cbrown596]

@@TheTerrorJumper incorrect, modern MRIs are not permanent magnets, they are electromagnets. Siemens connects a RAMP down kit to the positive and negative connections and are able to pull the amperage out of the system. Room is perfectly safe to work in while this upgrade is being done. The Ramp down also does not typically affect the helium level as the helium compressor is kept running. What this video left out was the upgrade performed in the equipment room where power cabinets are replaced. This requires 480v power to be cut to the equipment, so you lose recompression of the helium until you are far enough along to reconnect power.

[@AXNPictures]

@@cbrown596 In the end it looks like they filled up with helium so wouldn't that mean that the old one was quenched?

[@cbrown596]

@@AXNPictures No, during the upgrade procedure power is shut down to the cold head as you are replacing everything. The MRIs pressure bypass valves are set to vent excess pressure in a 'transport' configuration. Since the helium is no longer being recompressed by the equipment it starts to shift from a liquid to a gas and expand. If you didn't allow it to vent, the pressure would build up enough that it would rupture the overpressure burst disk and cause a quench. So over the course of the upgrade you lose helium at a rate of about 3% a day, so they will typically top it off before, and after the upgrade. If you allow too much of the helium to vent (helium level gets too low) it causes the internal temperatures to raise too much and can make it difficult to refill as the helium will now flash on contact with the 'warm' MRI. They then need to use almost 3 times as much liquid nitrogen to cool the internals, to then add helium, and then siphon nitrogen out in phases. (Huge pain in the ass)

[@avestator3763]

isn't there some danger from the liquid helium? like no cooling during a blackout and increasing pressure in the tanks?

[@Chopper153]

Mri systems have auxiliary power supply during blackout.

[@avestator3763]

@@Chopper153 thanks! Didn't knew that, but never thought about it

[@lucariolps277]

@@avestator3763 and they have Helium rupture disks. Basically. Overpressure protection.

[@michelgrenier1878]

Great technology , Wonder what the upgrade cost ?

[@davidpaniagua6835]

I’m so great full for these machines the hospital had to use a few of them with me due to my injuries these sure are some great machines and the people who built and designed them👍🏻👍🏻

[@samc5898]

Watching at .25 speed makes the timelapse ratio about 1 day per minute. Much easier to follow the actual process

[@bigdec1]

Bet they had a ton of leftover screws.

[@Nareimooncatt]

And probably found all the missing 10mm sockets during the first test run.

[@batbutonfire]

I love how they add all that shiny white plastic to make it look like a house hold item to patients rather than a scary metal death magnet.

[@tateerickson5820]

How did he have the camera in the room after the helium was put in

[@jeffsumeracki7263]

Helium is pumped into the magnet itself and is circulated in a closed-loop system. In the event of an extremely rare quench, the helium is exhausted through a special insulated pipe to the outside of the building. Thus there is little danger to anyone in the room, but precautions of course are followed.

[@JagaimoNeko]

Tate Erickson it looks like it is filled but not yet charged. I haven’t noticed a charger during this video.

[@KallePihlajasaari]

The magnet is attached to the wall. The magnetic field is fairly localised to the bore of the solenoid and if something is attached it will not be a problem at some distance. Also like Raman said the magnet was probably not turned on during this video. A surveillance camera will still be in the room.

[@symphantic4552]

I would love to see the running total for the cost of this upgrade

[@mcgrooter61]

But how we going to get it up to 88 miles an hour?

[@jbwebster]

Screw some bolts loose, and you'll see.. :D

[@someguy5035]

It spins at about 240rpms at max speed. It is going way faster than 88mph.

[@user2C47]

@@someguy5035 You're thinking of a CT scanner.

[@someguy5035]

@@user2C47 I pulled that stat straight from a video where they are decommissioning an old MRI machine,

[@Zortorond]

So, they actually just replaced the gradient coils and the body one? Not mentioning the table 'couse it's almost a cosmetic change.. With the field down it doesn't look like a big deal and also it's going to be another couple of weeks for rising and then tuning and shimming the field.

[@VOTEREPUBLICANS594]

If helium is getting in short supply and there is only some much on earth they why isn't it salvaged like refrigerant?

[@lingottodargento7711]

Complimenti, lostudio e l'artigianato quando collaborano sono unici

[@mclovin8739]

Your bill for being entertained by medical equipment video is $8000 plus any applicable state tax.

[@SP4CEBAR]

MRI scanners are the James Webb telescope of biology

[@phalanx3803]

nice now can you make an upgrade to make it silent. i work around massive loud equipment all the time but sitting is side a massive spinning metal donut that makes strange loud noises makes me uneasy i know a few people that straight up have panic attacks when they tried to go for a scan.

[@nitroxdeano]

how do they bring a machine that large into the room in the first place?

[@flintthuang]

Is it very expensive to ramp up the super conductive coil? I heard that there is very high chance the ramp up process will fail.

[@poly_hexamethyl]

Did the superconducting electromagnet remain filled with liquid helium while this was going on?

[@edmondhung6097]

I don’t know it can be upgraded. What is keep in place for such upgrades?

[@EdgyNumber1]

Fitting these must be a highly skilled job. 1) What is involved in training? 2) how long does that take? 3) What is the minimum qualification that these guys have? 4) Is the pay good?

[@LifeBloodMarketing]

Biomedical equipment tech, community college/tech training or Military Biomedical Repair Tech for starters. Problem solving mindset, how ever long it takes, pay is not a direct reflection of skill unless you own the business model along with sales. Starting out can be as low as 20k usd-and up.

[@MMT_Easy]

@@LifeBloodMarketing my first year (2007)with no training i made 60k because of the demand…. Im actually in this video training two technicians 😒

[@kymian572]

I somehow expected them to tear down the previous unit completely and leave the room empty. That section that they left behind, for lack of a better word let's call it a chassis, is it common to all MRI models?

[@Simon-ho6ly]

Not ALL MRI models but many manufacturers have common parts across multiple models

[@Chopper153]

They changed the core for higher magnetic field. Coils are left unchanged as they're superconducting.

[@TK-lc5vc]

@@Chopper153 The core contains the main magnet coils. The gradient coils and RF coils were replaced. Only the main magnet coils are superconducting.

[@FennecTECH]

So they are replacing everything but the magnet (which is going to be the most expensive component)

[@CatScanJim]

Our Radiologist liked to call the new Tesla 3 magnet images Radiology Porn they were so much better.

[@Hiphopasaurus]

Now I want to see one of those guys get in it. So, who wants to be the first one to test it out? :)

[@realalexesparza]

How would one get a job repairing imaging equipment?

[@DIYToPen]

How often do they have to top up the helium?

[@ConstantlyDamaged]

Curious question: why were all your measurements in metric until you got to temperature of the LHe?

[@Stiffler2k4]

looks as complex as a jet engine. Totally fascinating

[@justintyme2764]

Complex indeed. When this technology first debuted in the mid eighties it was the third most complicated system designed by man. The space shuttle was number one and a nuclear submarine number two.

[@des_smith7658]

Not rocket science then?

[@ShainAndrews]

Considering turbine engines are dead simple...

[@danatmonst3594]

2022 and still fascinating, thanks! (not sure how I ended up here but thx)

[@des_smith7658]

I ended up here because of my GP

[@des_smith7658]

And post op, in a CT scanner

[@danatmonst3594]

@@des_smith7658 Hope you're healing, wishing you all the best.

[@des_smith7658]

@@danatmonst3594 thank you for the kind wishes I have made progress and have normal psa now

[@danatmonst3594]

@@des_smith7658 Wow! Thats awesome news!

[@cat81702]

So that pumping sound in a MRI room is actually a pump for liquid helium?

[@idiotduvillage974]

No, it's just the sound produced when the machine is actively imaging. Helium is depleted for emergencies only. Google MRI quench

[@leemilica]

Oleksiy Marchenko that "cheh-wee" sound you hear is a liquid helium pump, but it is called a Coldhead. It keeps the liquid helium from falling to the bottom and turning to gas, which is important to cool the large electromagnet coil inside.

[@oklagrowmie5587]

As a Linac specialist. This is awesome and cute:P

[@doozerchuck8625]

Whew, I was a linac specialist for 10 years...bless you🤪

[@subbywan1422]

"Increases the speed and doubles the resolution" ... what does it do to the price to get an mri?

[@nairsreehari96]

Last time i had an MRI scan, i never thought i was inside a 14 ton machine filled with liquid helium.😮

[@GeneralChangFromDanang]

Same with CT machines. I never realized it was a rotating vortex to another dimension.

[@nairsreehari96]

@@GeneralChangFromDanang 😂😂

[@support2587]

Always feel a little sad at the end of a great install. How does on3 get into the MRI installation gig?

[@funnyyylock]

How do they decontaminate

[@madders100]

what's the cardboard box for at the end?

[@chickey333]

It looks like an overgrown coin operated washing machine to me but what do I know. I'm sure the cost of running a load in one would be rated in quantum fiscal leaps instead of quarters.

[@kd1s]

Yes indeed engineering porn. That said I've had exactly two MRI scans in my life. On of my head for ear issues, the other a full spinal only to find my discs are dessicating. Fun times.

Total Recall in Mars: -"How many time this MRI upgrade will take?" -"Two weeks".

[@RussellD11]

very niiicee, and how much???

[@Shopweasel]

how many mri's are In use currently in the world?

[@ovalwingnut]

GR8T video... catchy TOon. Super Infotainment. Thank you

[@AaronSchwarz42]

Room temperature MRI will bring costs down 5x & make a huge improvement to medical imaging

[@outerrealm]

Illinois. That’s the US, right? Thanks for giving the weight in pounds as well as kg. That was a big help. How ignorant and arrogant can you get? People who know what they’re doing on their channels, since the whole point is educational, understand the importance and ALWAYS give measurements in both systems.

[@melody3741]

Do they not use the helium up??

[@АлександрЖеребятьев-о3п]

where did you get that special lift jacks for MRI that fits so good? (1:40)

[@cynosiad]

They're custom made for each system

[@Alazim7890]

change the playback speed to 0.50x

[@sergejnadazdin2234]

whoa! that gradient coil is small! I taught it was inside of the metal chamber, but actually it goes in the hole!

[@leemilica]

Sergej Nadaždin it is me, but in the future... also a correction: thought not taught.

[@Renatodonadio]

The magnet is inside the chamber, the gradient coil is used to shift the magnetic field direction rapidly to obtain "contrast" so the scanner can see the images of inner tissues

[@pykapuka]

How long does it take to turn off/on the magnetic field?

[@meowzass]

you can’t really “turn off” a magnetic field. a magnet is always constant and always “on”. if there was someone in danger of losing their life in the magnet or losing a limb then we would quench which is when the machine expels all of the helium out of the magnet and it “loses” its magnetic field. that’s in very rare and dire situations and is rarely ever done. other than a situation like that the magnet would be always have it’s magnetic field.

[@pykapuka]

@@meowzass If you get rid of the helium, the conductor gets warmer and begins to lose its superconductivity which means the high currents will get converted into more thermal energy. So it will quickly reach a point were all the energy from the magnetic field will be converted into heat almost at once. Wont that destroy the whole mri?

[@user2C47]

@@meowzass According to another comment, this unit is able to simply discharge the magnetic field, without dumping the coolant.

[@bitterlemonboy]

@@meowzass Would they really do that? I don't think it's worth wasting a ton of liquid helium. Just let the patient get hurt, it would be cheaper

[@justinstergar6757]

Two weeks to complete the project?!

[@Unknown_Ooh]

I've always wondered why the MRI room is always cold and now I know lol

[@dma3685]

Is that one From Siemens?

[@lanhtrandkh]

Many thanks for sharing!

[@DelGTAGrndrs]

How do I get into this field?

[@atexnik]

3:26 is it allowed to stand there?