What happens behind the scenes of an MRI scan?

[@StrangeParts]

You can watch this without ads on my streaming platform, Nebula! nebula.tv/videos/strangeparts-what-happens-behind-the-scenes-of-an-mri-scan

[@fitybux4664]

3:25 Button box seems overly complex and expensive. Just run 5 fibers to it and connect the 5th fiber to the 1/2/3/4 variety of color fibers when the buttons are pressed. Or even simpler, run 8 fibers and have the switches literally just cut the light path as they are pressed. The steering wheel can be like an optical encoder. A grated wheel that spins as the wheel is turned. With four fibers (TX1/RX1/TX2/RX2), you can determine direction. (Like the scroll wheel in an old mouse. In fact, you can probably literally use the chip in an old mouse.)

[@thedavesofourlives1]

Maybe with subtitles of the tech speaking?

[@becaldridge1584]

This is really interesting id love to see more nish high end machines like this … maybe some military tech ? 😮

[@mirroredchaos]

or we can just use adblock

[@Garfield1996]

How does this translate mind frequency

[@ThisIsTechToday]

So glad you're back, but most importantly, glad you're feeling better and making some good progress! Miss you, bro!

[@unmanaged]

agreed ... glad to see you back

[@Platypus_Warrior]

Same here. Happy to see back and doing well. Take care

[@johncgirdley1305]

I'm really claustrophobic so I do not like MRIs

[@RobertShaw-fl3os]

Investing videos Glad that you're feeling better

[@NoNonsense316]

Being a cancer patient, I have brain MRIs on a regular schedule. I thought I had a reasonable understanding of how the MRI works, but this ~20 minute video taught me more than I could have imagined. Thanks for the awesome content!

[@anthonywheeler6133]

Hope you’ve had luck with your cancer treatments, surgeries, medications. I’ve had at least 25 MRIs in 2022, now I’m spaced out to every 4 months for now. I’ve had 6 tumors in my brain, not all at the same time 1999(1), 2002(1), 2022(5) and 7 surgeries. I was super lucky to go 20 years without any issues or medications. Then out of the blue I had a seizure and that’s how we found them again. They’re grade 3 tumors same exact as I had 20 years ago 1p-19q co deletion with mgmt promoters. Same as before, I did photon radiation the first time I had it. I am taking the same chemotherapy as last time procarbazine (matulane) and a couple hours on the iv at the hospital on day 8 and 22 of my treatment. The rest of the time it’s just pills. I still have spots on the brain that light up with the dye. My neurosurgeon takes the time to go over previous MRIs vs current MRIs.

[@SaltimusMaximus]

Likewise, it just sounds like having your head in an unbalanced washing machine, I usually am concentrating on trying not to feel claustrophobic after 10 years they sometimes are a struggle

[@NoNonsense316]

@@anthonywheeler6133 Wow. Here, I thought I I had a long and storied history. Good to hear it sounds like you're doing OK with treatments and being spaced to 4 months is a good sign. I got diagnosed with melanoma in 2004 and metastasis in 2006. Oncologist at the time gave me 20% of surviving 5 years. I'm still here, fighting. I'm on immunotherapy for the cancer. Found one metastatic brain tumor back in March (2022) on a random MRI (lousy birthday present, by the way, but they wouldn't let me return it). Tumor was killed with a Gamma Knife procedure. About a half day of additional CT & MRI, fitting for a mask to immobilize my head, and such. The actual procedure only took about 7 minutes in the machine. Now I get brain MRI and head-to-toe PET+CT scans every 3 months. Besides my oncology team, I have a friend who is a radiologist at the hospital I go to. I ask him to look over my scans; he's VERY thorough.

[@godschild3640]

@@anthonywheeler6133. I have non small cell lung cancer Adenocarcinoma my brain 🧠. Hurts bad ,,my eyeballs ,,I FORGET 🥶TO 🥶BREATHE🥶 NOW 🥶

[@VickyCooksalot]

Wait! I'm a cancer survivor. Since it was cervical should I be worried and getting regular scans?

[@ThisClarkDude]

i am SOO glad to see you back on youtube! i didnt know you frequented other social media and i had assumed the worst. Glad youre doing good

[@LantosAhim]

Same here.

[@rudikdk]

And here :) (y)

[@m3m3sis]

So much this

[@JohnPaulBuce]

yes

[@imperia6368]

My right chest been experiencing muscle wastage ( muscle shrinking over time )after a injury in gym but both USG and MRI scan didn’t find anything .

[@camael4209]

I've had a mri scan once for a heavy shoulder injury. It's very interesting how it works and the doctors were kind enough to explain it. It's a marvel of a machine. Medical machinery like CT-PET scanners and MRI scanners are engineering marvels and help save countless lives.

[@Robert-cu9bm]

I pretty sure you can thank CERN for this.

[@cooprr.r]

Same and I have to get an injection of dye in my shoulder before the mri

[@camael4209]

@@cooprr.r yea that's contrast fluid which they use for the scan to look for any damages etc. the needle was a b.... though. It had to go through the cartilage which means the needle was huge.

[@niketsingh9888]

@@Robert-cu9bm @@@

[@imperia6368]

My right chest been experiencing muscle wastage ( muscle shrinking over time )after a injury in gym but both USG and MRI scan didn’t find anything .

[@5uq]

We've all missed you dearly, glad to see you back and excited to explore new projects and discover more knowledge😀 WELCOME BACK!!!

[@Muhammad-sx7wr]

Man I miss this guy so much. He is genuine and conscientiously a good person. Bro don't worry about the quality that you previously had with regards to technology videos. Keep on producing. As long as your health permits.

[@tinam2696]

Today I was told to set up an MRI appt. I told them I wanted an OPEN MRI. After seeing this. I made the right decision. YIKES that tub is tiny!

[@eugeneeugene3313]

Sorry man. You made a wrong decision- quality of open MRI images is much lower than normal MRI. The SNR is proportional to the magnetic field applied. In open MRIs - it is about 0.3T only, while in the closed one it is 10 times more!

[@InTelClan]

@@eugeneeugene3313yeah but unless it’s a more complex scan. A open mri won’t cause too much of a problem when is coming to imaging. If you have claustrophobia there’s not much you can do

[@teddine7366]

@@InTelClan I just close my eyes and zone out. If they can give you music that helps to. I'm on pain meds anyway so I zone out when I'm in there.

[@Yosoychristo]

As an MRI Technologist glad this video gives patients the insight on how we operate the MRI console and how important MRI safety really is.

[@derrickkwan5904]

So happy to see you back on the channel. Hope you are doing better and recovering well.

[@ibuprofenPill]

A friend of mine is an MRI tech. She said the toughest thing is seeing people with advanced cancer. You know their time is short, but you have to play it off like you don’t know.

[@SG-pc4sv]

Hate ibuprofen, gives me stomachache 😅

[@ibuprofenPill]

@@SG-pc4sv then use acetaminophen, sucka.

[@fluffytail6355]

A lot like what sonographers deal with

[@teddine7366]

Yea.. I have the lung cancer large cell. Six months later they said the tumor shrunk in half. This new immunotherapy is a game changer they are saying in treatments. I'm still scared though of not getting better and I'm getting sick of being medicated or being in pain.

[@BlazingMediic]

Welcome back Scotty. So happy to see you back on KZbin, Definitely one of my favourite KZbinrs

[@Aspire198]

Man you gotta love when you meet guys like this MRI tech. Super passionate about their field, happy to explain and provide anecdotes on ops. Love it.

[@SICresinwrks]

Last time i had an mri on my hip a few months ago i was actually wondering how the buttons i was holding worked since there couldnt be electronics or metal. I always learn something from the videos you create!

[@WouldntULikeToKnow.]

I had an MRI of my hip about a decade ago but didn't get any buttons or way to communicate (except a speaker in the room I think?). I wonder if that is newer tech?

[@SICresinwrks]

@@WouldntULikeToKnow. i am guessing so, i also had one in 2001 or 2002 and didn't have the buttons that i can recall.

[@SICresinwrks]

The one i had first was on my knee, not sure if it makes a difference lol

[@pjs199]

Ben Krasnow over on Applied Science on here used to make those button things and other mri-safe devices I believe!

[@guygadbois1068]

I've had brain surgery for a tumour that involved an intraoperative MRI. All the equipment in the room has to be MRI safe. We're talking electronic life support equipment here because I was obviously under general anaesthetic, on a ventilator with my skull open and brain exposed. Don't know how they do it. I've had about 35 MRI's now at about 45 minutes each. I've come to enjoy the sounds. Some places are less strict. I've had MRI's with jeans on before, so zipper, studs etc and it was totally fine. I asked them and they said it's fine... and it was. 3Tesla machine too.

[@hebrewhammer1000]

MRI repair engineer here, that's not a helium circulator. That's a gradient water chiller. It uses glycol and distilled water and circulates it through the magnet. You can see the helium compressor behind the chiller.

[@Vousie]

I thought the helium is what gets circulated through the magnet?

[@LastofAvari]

Welcome back to KZbin, Scotty! Hope this crazy MRI machine will help to figure brain things out. It looks really impressive.

[@d.bcooper2271]

It does nothing

[@coastersaga]

@@d.bcooper2271 How come they put Chance in there when it was Scotty who had the concussion?

[@Animaniac-vd5st]

Most importantly, seeing you on screen again like this means that you're feeling better. That is the biggest news and makes many of us happy. Looking forward to new videos from you.

[@joeyramonelookalike]

It's great to see you're back!!!! and also that there's some good folks out there helping you get better.

[@tsram]

Slight correction there at 2:50. There are RF coils inside that create the RF pulses. The gradient coil actually creates a variable magnetic field inside which is used to obtain spacial information. Same thing at 4:50 that's a RF coil.

[@areyoustupid.....]

Haha was just about to correct that. 👍

[@jordanhermiller9756]

Also, isn't it these time-varying magnetic fields created by the gradients that are responsible for the periphral nerve stimulation? Not the radiofrequencies traveling in a loop.... Timestamp at 14:37.

[@areyoustupid.....]

@@jordanhermiller9756 yes but not deliberately I think. It is accounted for in gradients design to limit this therefore reduce artifacts..... but I could be wrong. Not worked on them in a few years!:-)

[@tidalfite2748]

So what comes up in the boxes at 8:19 is called slices and that is all the radiologist will see?

[@areyoustupid.....]

@@tidalfite2748 you could say that yes. Different thicknesses and different planes, depending on what they want. Can even have 3d reconstructed images or fly-throughs the inside of arteries!

[@RussellShore]

Welcome back Scotty. I hope you make a full recovery. It’s good to see you again.

[@seeminglyRANDOM88]

Glad to have you back on KZbin! Hope all goes well with the future of your concussion recovery. Looking forward to seeing some more content soon.

[@TooLazyToFail]

I have an MRI on Wednesday! I've had quite a few of them, but this was the first I'd heard about peripheral nerve stimulation! I'm going to see if I can interlace my fingers in front of me to experience it. Please take care of yourself and feel better soon, my friend! The search for answers is so important. I hope you get some!

[@IZLabs]

If you've had a couple MRIs you may have already done this, but if not you should print your brain! It's actually super easy to do and gives you something cool to hang onto to. I made a tutorial recently showing how I did it for mine: kzbin.info/www/bejne/oWK6eqOti5Jroqc

[@reddevilfan100]

Don't want to rain on your parade but unless it's fMRI or another kind of specialty scan you probably won't be receiving enough RF to get it as much as this guy did, fMRI requires a lot of RF!

[@brainthesizeofplanet]

@@reddevilfan100 Just ask someone for the code to unlock scanning mode 2 - that'll do 🤣 - but u are correct, in general scanning it rarely happens but we sometimes see a patient who said they had tingling/pain in their extremeties, so it can happen/get close under normal scanning in some scenarios

[@SarafinaSummers]

Oof. I keep doing that by accident. It feels weird! Like getting naild with a hundred feathers on your fingertips!

[@PuppiesPuppies]

Very happy to see you smiling and enthusiastic at the end. Health problems can be such a downer and make it difficult to engage with others in a positive way. Also, love the windows and light in the new shop, way healthier looking than the last one. Excited to see what’s next!

[@jillcrowe2626]

This was so cool! I worked at a major research institute attached to a hospital. The MRI was in a temporary building with TILE FLOORING. Well, one night the janitor, who I had a nodding relationship with, was tasked with cleaning the MRI area. The floor was scratched up. He decided to do a really good job and buff it. He went one inch over the yellow stripe on the floor, and the huge buffer machine was ripped from his hands and went into the machine. He was so frightened, he just went home. He didn't tell anybody, certain that he would immediately lose his job and probably have to pay for the damage. The next day, his boss phoned him and said please come back, nobody is mad. He kept his job, and they hospital put in an order for a new MRI machine. He was a very nice gentleman.

[@MeanOldLady]

That's what shits me about hospitals. They can casually order expensive new machines yet have the goddamned audacity to ruin people's lives with their outrageous bills!

[@gemininy1211]

​@@MeanOldLadythis person doesn't have an accurate account of what happened nor are they an MRI tech. The machine did not get replaced. They simply pressed the magnet off button, which forces them to replace the helium, not the machine.

[@Vousie]

@@gemininy1211 According to this video, it's not a "magnet off" button so much as a "fry the entire magnet, causing $500,000 worth of damage" button...

[@urfavuritgirl]

I’m currently in school for radiologic technology and I want to specialize in MRIs. I’m currently completing my prerequisites and I haven’t started labs or clinicals so this video was extremely informative and taught me a lot about what I’ll actually be doing and what I have to look forward to. It’s so cool! Now I really can’t wait to get to the hands on stuff!!!

[@Garfield1996]

How easy is it to remove

[@swiftarrow9]

So glad you will be getting some care for this concussion! And thank you for making this video, and keeping us updated. Wholeheartedly wishing you the smoothest and speediest and best recovery possible.

[@iamsecrets]

I just remember that you needed to take time off for your concussion. SO good to see that your well enough to be making videos again! My wife had a concussion last year and it was no joke. She was out of commision for 3+ months.

[@AdityaMehendale]

Another fun-fact: The RF-coil produces the stimulating RF-field. The gradient coil does not produce the RF-field. The gradient-coil produces - you guessed it - the *gradient* . This is similar to tensioning several identical guitar strings at various tensions so that each one 'plings' at a slightly higher and unique eigenfrequency.

[@tidalfite2748]

So at 8:19 what comes up in the boxes is called a slice and that is all the radiologist will see?

[@tsram]

There are two sources of noise in MRIs. The continuous one is from a cryocooler, which is a small cooler that keeps everything inside at - 270 Deg C. The noise during scan is from the gradient coils that expand and contract as they are energised.

[@timsouter1]

I'm so so happy you uploaded again Scotty, I hope progress is good.

[@MrCelloman999]

So it sounds like the magnet coils are superconducting, which explains the helium and emergency quench protocol. The types of measurements they’re doing require crazy high currents, the kinds that would generate enough heat to melt the machine, so they use materials whose electrical resistance vanishes (mostly) when cooled past some critical temperature. A quench is an event where the superconductor loses its superconductivity rapidly by passing the temperature or magnetic field threshold. If it happens fast enough, the rapid change in magnetic field and sudden very high heating can cause magnet damage. Source: I work with particle accelerators and we use superconducting magnets and cavities.

[@petevenuti7355]

The sound, I assume those vibrations from the changing current is at least one reason why they don't use those *high temperature* 😨 superconductors, ceramic too brittle? Or is it flux pinning, I expect the same property that makes those cool demos would be a problem with a MRI or accelerator? Also, you wouldn't happen to know how they get the high muon flux for that ring they moved from Brookhaven would you?

[@NishankBansal]

My man is back. So excited to see the notif pop up.

[@ArthurdaPaz]

Had the same feeling. I was missing this content ❤️

[@diehardpizza7107]

im so happy to see you went to cognitive, my gf had a similar thing where she hit her head and got an injury, she ended up traveling to america to go to cognitive fx and to get better. i hope they helped you as good as they did to help my girlfriend. and i wish you all the best in the recovery.

[@bugattibuilder]

Glad you are back. Really hope you are feeling better. As a Dutchman: what is the story on the poster with the map of The Netherlands?

[@mikevanriel]

I am eager to find out the answer to that too :)

[@Tedd755]

You're really awesome, Scotty. I'm so glad you're doing so well! I'm also blown away that you decided to make not just one, but a whole bunch of videos by virtue of your concussion. In particular, this one. There's not many MRI or fMRI videos available, and certainly not to the depth that you went, and it's such a valuable contribution to humanity. Love and thanks. :)

[@FaresDjebbar]

Glad to see you back Scott, always a pleasure to watch your content, MRI machines are very interesting !

[@amirobeidat4561]

I was rewatching your videos for the past few days in a row, ran into a comment where someone said "Building my own MRI machine from Shenzhen Parts" and here you are haha. So glad to have you back!

[@reddevilfan100]

Hey Scotty, super glad to see you back :) I'm a grad student doing MRI research and it's super cool to see the tech explain it to you, he was so knowledgeable! The physics behind MRI is wild! Learning it was like learning a new language, fMRI, PNS, BOLD, etc. It's also its own kind of music, I've gotten to the point where I can tell what kind of scan is going just by listening to it, the structural scan in the video was a gradient echo sequence😁

[@Garfield1996]

It’s kind of dangerous

[@SandeepSingh-sz6kl]

It's so ironic that I was searching for the update on your health just a few days back. So glad to know you're doing good. Looking forward to seeing you back in action again.

[@MrDaExo]

So nice to see you recovering and getting back to videos. If you are interested in doing a more technical look into MRI, I'm a MRI developer at Siemens and would be happy to help out.

[@marklemont3735]

I have a technical questions as a patient. How do I prevent my tinnitus from worsening in a 3T Tesla MRI? Had my foot MRI and my tinnitus was worse for months used foam ear plugs and the headset the technician gave me. 3T goes up to 130 decibels. 1.5 T only 90 decibels.

[@MrDaExo]

@@marklemont3735 unfortunately MRI is Indeed very loud. There is not much more you can do as a patient than ear plugs and the headset. However, from a technical side, the noise highly depends on the type of image you are scanning. That means that the difference is not necessary the biggest between field strength but rather what kind of tissue you want to highlight in the image. There are ways to make the scanner quieter but often that requires longer exam times or may result in worse image quality, therefore it's rarely used in clinical routine except for pediatric patients.

[@marklemont3735]

@@MrDaExo Thank you so much for your thoughtful response. I might need to use a 1.5 T in the future.

[@zsoltlajtos6527]

Earlier today, out of nowhere, I just remembered to check your socials to see how your recovery was going. Talk about timing! Glad you're feeling better and making content again. Wish you all the best!

[@br88dy]

Glad to see a positive update on your health! I wish you the best. You're living my dream of learning more about whatever interests you, which sometimes involves traveling the world. So cool! You're a great communicator and a great teacher.

[@joseph7858]

Dear Scott, I just wish you some more good recovery and all the very best! ☺️🍀

[@sankalpietechtips]

Doctors with this complex machine say : "Oh no its completely safe" and then stand behind a suspiciously well sealed chamber

[@HoldFastFilms]

Where are my PACS Admin peeps at? Good to see you recovering!

[@crazy808ish]

LOL this is the randomest professional callout

[@Lwah0812]

As a person who gets MRIs on a regular basis due to MS this was pretty interesting, I wonder how soon the advanced MRI technology will become available, I am sure it will be really useful in so many different cases.

[@droknron]

I'm so glad you're feeling better. I've thought a lot about you over the past several months since your initial video detailing your concussion and I'm happy things are moving in the right direction for you.

[@maxhouseman3129]

As long as you don't have to program custom MRI sequences, it makes kind of fun to run it.

[@whg6906]

Lol I feel you

[@Cyrashe]

Great to see you again. I hope your road to recovery continues to go well; we'll be here as long as you need.

[@manu.yt25]

16:20 some subtitles in the video would have been nice for all those parts where the recorded audio is bad

[@dunscap]

I had an MRI last week and this answered all of my questions that I wanted to ask the technicians but didn't want to take up their time . Thank you!!

[@georgeverghese1009]

Couple of comments : At 4:51 : The "arms" around the Head coil do not contain Gradient coils, nor do they "put out" any Radio frequency. The arms actually house RF loop elements that actually pick up signal from the brain. The head coil that you have in your hand is a receive only coil and does not transmit any RF......the RF excitation pulses are transmitted by the Body Coil inside the scanner and the Head coil only "picks" up the signal from the brain, amplifies it using preamps and feeds it into the scanner for further processing via the connector you showed at 5:00

[@TannerJ55]

Thanks for the clarification! We do have a TR coil that can also be used with our machine- would that coil use the included transmitting coil and the body coil as well, or is the body coil only active when the head coil is only receiving RF?

[@georgeverghese1009]

@@TannerJ55 In a TR coil which is used mainly due to SAR considerations, the local TR coil transmits and receives during the whole exam.....,...the body coil is completely inactive when a TR coil is used and is in a "detuned" state. In the case of Rx Coils like the head coil you had in the video, the body coil transmits and the local Head coil receives.

[@charlesrovira5707]

I wondered what had happened to you. Welcome back. Let's hope everything gets better. I usually get MRI scans once a year. This sounds like a *Rolls Royce* scanner compared to the *VW* scanner at the hospital. (Of course, they all sound like you're in a lapidary roller. )

[@SeanBZA]

Not many manufacturers od MRI machines, so really the only difference between them is age, and the newer ones tend to have better response, and are slightly faster, and of course a larger aperture for the patient. Making it bigger is the largest cost, it is not a linear increase in price and complexity, but exponential. $2 million is the price of a used one, less the actual cost of installing it in the nice new concrete structure you have to build for it, which also has specifications on the types of concrete gravel ( all non ferrous) along with the types of reinforcing you can use, and the layout. Then the copper shield needed to make the Faraday cage around the room, and then the doors and windows to access and see in, which need to be continuously bonded and also have shielding inside. Installing one can easily make the purchase price the cheapest part, then you need all the support equipment, and the backup generator sets to keep it running in a power cut, along with fuel for a month of generator running.

[@cbb8323]

You are one of the few youtubers I actually like to follow. I wish you all the best and hope that you will recover 100%. All the best from Denmark

[@richardwatkins6725]

fMRI is awesome, revolutionary…. to see the brain working, nerves firing or nerve damage etc. Hope it helps with you concussion

[@paulbradford6475]

I built sub assemblies for these machines at a company outside of Boston. If you pulled the "skins" off the circular portion of the machine, you'd be amazed at the sight of all the machinery that goes whirling around your head. The amount of precision and labor hours it takes to assemble and test these machines before shipment is truly astounding.

[@mnnomad1870]

Why does my body get so hot during the lumbar MRI? Should I drink extra water before I go in so I don't vaporize ?

[@d4niamvs703]

i also experienced my back getting really hot when i did my lumbar and thoracic

[@sumbalsohail5594]

Yeah same here 😟

[@glitterforeverrr222]

i know it's 6 months later but i just had another one and apparently it's energy friction between you and the machine and that's what causes you to feel hot, i thought a pad they put on me was a heating bad because i started to burn up

[@mnnomad1870]

Last time at least they offered me a washcloth. I didn't know they had that in their high tech bag of tricks. Hope you never have to have a cervical MRI with your head in the Darth Vader mask. Just don't fall backwards off a 6 ft ladder

[@randomedits2974]

It’s because at one point of the mri they need to open heat on your back so they can see the mri more hope this helps

[@shirajai]

I’m a MRI Student in extern, thank you so much for showing our career field!

[@aidaneloff5357]

Some MRI scanners have pneumatic headsets. The speaker is mounted in a fixed position within the scanner. When the machine is set up, the technicians use phantoms and a calibration tool to measure the shape of the field and trim it to size by placing metal sheets of varying thickness in rails running along the bore. The calibration tool software will suggest a size and slot position. Another interesting thing about the installation is the room - it’s a faraday cage. The doors have metal seals consisting of copper fingers or a tape with mesh to prevent RF leaking into the cage. Also, cables and oxygen tubes are passed through a tube in the cage rather than a simple hole; the hole would cause RF leakage. Instead, a tube approx 200-400mm long is used and welded to the cage. You can see the tubes (bottom right hand side) and copper sheeting of the cage at 15:55. It is longer than the RF wavelengs and prevents leakage. The windows also have mesh to prevent leakage. The AC supply to the lights and plugs also go through signal filters when they enter the cage.

[@bassemb]

Welcome back! This is fascinating, for example I didn't know the head cage was an active component! Also I hope there will be a longer video about the brain camp, the short left me wanting more! Please don't worry about matching your older videos. We're happy to watch everything you put out.

[@Shroomy_Games]

I was recently in an MRI for a shoulder scan and I had some insanely epic hallucinations during the tests it was crazy. At one point it was almost like I could see the warping of the space around me.

[@casedistorted]

Ok that is def weird because I just had an MRI scan on my brain and I got sleepy lol

[@ikeasanders6211]

@@casedistortedwell everyone is different so it makes sense what above commentator said

[@sheilaashley3416]

This happened to me during a CT scan. When I walked in the room, I saw red laser beams everywhere. Beams that no one else saw. I smelled a weird chlorine smell. Once in the scan, I saw like a thingy flash and light, similar to men in black. I jumped off the table. They tried to convince me that it wasn't real. They tried to make me do it again. Same thing happened. I jumped off the table. I recently tried to do a MRI and I now have PTSD from that CT situation and the shadows when eyes are closed and the loud noises were too much for me.

[@Shroomy_Games]

@@sheilaashley3416 a ct is drastically different than an fmri scanner it uses X-ray scans not magnetic flux

[@jasminea58531]

Just had this same experience during and after my MRI today .

[@foxyang7634]

glad to see you health and passionate standing there! Great to see u back again!

[@FelineGoblin]

Amazing to see you back on KZbin! But this was a weird one for me to watch. A couple of years ago, I went for an MRI scan with a stainless steel necklace on. Happened due to staff negligence I guess. But MRIs scare the life out of me to this day. Interesting to hear about the venting procedure. It’s strange to know how much financial damage I almost caused the hospital!

[@rdizzy1]

There are many metal objects that don't seem like they would be safe that are safe in most MRIs, such as pacemakers and copper IUDs for example, or braces, or stainless steel joint replacements, most stainless has an extremely low reaction to MRI, just can distort the image but isn't really dangerous.

[@FelineGoblin]

@@rdizzy1 the magnet pulled it so tight against my neck I literally couldn’t breath

[@rdizzy1]

@@FelineGoblin Probably made out of magnetic stainless then.

[@davidmr6268]

Super happy to see you again !! I was wondering about your situation last week!! Wish you to recover totally as fast as possibile!!! Keep fighting man!

[@sherizazzetti1824]

Wow but I'm going back for my second try to go through the MRI machine and get claustrophobic so watching this is helpful

[@ddsbaldspot4166]

Just close your eyes I didn’t open mine till they were pulling me out

[@rayecoone5889]

How did your mri go?

[@sherizazzetti1824]

@@rayecoone5889 I did it just closed my eyes and they gave some meds and it helped

[@darkmatter6467]

So glad you are back!!! I hope your recover will continue at a steady pace til 100%.

[@sapperdeflap]

Hi Scotty, nice to see you after a long period of time, i was curious though what the map of the Netherlands is doing in the background, (at 17:54) was this clip shot in the Netherlands?

[@Modern-Crafts]

I am really glad you feel better! Looking forward for new content about the shop etc.

[@NaoPb]

Cool video. Very interesting. And randomly seeing a school map of the Netherlands was funny as well. I haven't seen those for a long time.

[@coreyw4230]

So glad to see another video from you, and I'm glad you're improving. You are sorely missed!

[@IZLabs]

Welcome back! I know you were joking about it in the video, but 3D printing YOUR brain is actually really easy and gives you a fun thing to keep around. I had to get an MRI and ended up 3D printing mine, I even made a simple tutorial on my channel you can reference if you're interested (kzbin.info/www/bejne/ppTNp2R4hZqrerM and kzbin.info/www/bejne/oWK6eqOti5Jroqc). Glad you're feeling better and I look forward to seeing more from you!

[@desmond-hawkins]

Welcome back! I'm so glad to see you smiling and doing things you love. We've all been thinking about you and hoping you're doing better every day.

[@hemantsharma637]

Not fun when you are claustrophobic

[@Jabberwoky]

Luckily I am not as I have 2 a year, I fall asleep!

[@Zebbmanbuku85]

I just did mine thought I was going into a cellar

[@Evolutiontweaked]

Why is it made so small why not as big as a CT machine

[@antekb1979]

​​@@Evolutiontweakedbecause CT machine is actually a huge bearing fitted with Xray tube on one side, Xray detector on the opposite side and the electronic and power supplies..On the other hand, MRI scanner is a huge superconducting magnet. So here the challenge is to have super homogenous magnetic fild inside the bore (well, actually there is a dozen or so more ... ). To have a glimpse on how MRI really works, you need at least 4 hour of video ...

[@Thekidwhohatesschoo]

WTF Is a cellar​@@Zebbmanbuku85

[@joefranks4235]

I work for a company that manufactures the rooms for MRI. What you don't see are the copper walls behind the dry wall, the ceiling and the various layers under the floor. We also assemble the doors to these rooms and I am happy to say I am responsible for the metal fingers that surround the entry door. These fingers assists in the locking and sealing of the door before the MRI is set into operation. Our newer doors do not utilize these fingers, but there are enough doors out there globally that I make a boat load of them. This construction aids in the elimination of outside signals that would distort the MRI image.

[@Murphistic]

Next on Strange Parts: I've built my custom MRI machine.

[@maxhouseman3129]

Based on parts of Shenzhen market.

[@TheTripleDeuce]

it is so good to see that your platform is helping you and informing us the viewers!!! cant wait to see what else you have in store! stay well and have fun!

[@Aepek]

7:31 had an MRi of my head 2.5 weeks ago for damage around my “hearing loss” I’ve been experiencing caused by tinnitus that started back in February and just has gotten worse. Also found out that I have a hard time hearing in the 4,000Hz range more so in right ear than left (but it’s in both ears), & b/c of the tinnitus and small amount of hearing loss; will be picking out, fitted, & getting hearing aids for myself by end of the year (will be a custom made set and will also include Bluetooth, which I think is really cool as will be able to use not just for hearing, but connect to things like: family TV that luckily has Bluetooth and will be able to turn up/down volume so I can hear w/o turning up/down for rest of family….I think that’s awesome. Should also be able to connect to my smartphone, again….awesome….etc) and hope they end up turn out, & work the way I’m hoping they will; along w/ not getting “ear fatigue” from wearing headsets/earbuds while gaming, working, etc…..but will have to see. Also glad have insurance (which only pays 10%-20% of cost, but better than nothing). So I had this headgear on in the MRi and Doc wanted contrast, but had allergic reaction last MRi and so tech said nope, not doing contrast. Which brings me to my 2nd story real quick like. When had a scan back in 2018 it was from chin down and pubic area up that they scanning. Well, I’ve had CT scans before, MRI’s before and so on so thought nothing of it. However this test, I had to squeeze the bulb for them to stop the test because what was happening to me is: I was baking from inside out! It was also exacerbated from the medication I take and for them to get the scan completed: I was in my underwear, no blankets, had 5 fans on me as were trying to cool me down. That room already kept at pretty decent temp as is, but what a feeling to have and buckets of sweat pouring off you, lol. So much fun, so I get when he says “will start to get warm’, and it’s not a pleasant experience at all.

[@elijasowa2808]

Cant express how am glad your back... speedy recovery!!!

[@bobvedder2451]

I have had several MRIs, they usually let me listen to music. I almost always choose Native American flute music.

[@Spgal]

That type of music is so relaxing.

[@dannorris1406]

Good on you Scotty. Great to see you back and appreciate how open you are about the issues that your injury has caused. All the best on a full recovery soon.

[@jonasghafur4940]

super cool to see you back and even cooler to see you inside the exact world I worked for years before going to med school! Rads is awesome ;) Edit: I LOVE to the that medical jank, that jerry rigged leukoplast gaffa tape mirror contraption fills my heart with joy lmao

[@teamtechworked8217]

Glad to see you back! Happy to see you are getting the help you need to get yourself better. Get Well Soon, Buddy.

[@bullhornzz]

Glad to see you back on KZbin Scotty! This video is fascinating! Seems like a great group of folks there and super glad they reached out to you, Hopefully they're able to help you in your recovery!

[@memphistim]

How cool is that! Glad you are feeling better and look forward to having you back in the watch list on the regular!

[@peleon79]

So glad to get a new video from you. Looking forward to your recovery.

[@GodzillaGoesGaga]

Best of luck with your recovery. So glad you're back.

[@Tehrawrzorz]

I'm really happy to see this video in my feed. Strange Parts was something that really got me into tinkering. I hope you're doing well on your recovery!

[@jimcabezola3051]

So happy to see you again! Just...keep healing and getting stronger. Don't rush it. Embrace and enjoy your life. ❤

[@N2O1138]

So much in common with the 3d X-ray / CBCT machines used in dentistry, I do IT for that industry and there were a bunch of things I recognized

[@JohnWizz]

Great to see video's from you again! Glad to see your finally getting back on your feet!

[@johnjennings959]

@1:40 the magnet that makes the magnetic field is inside of a cryostat, the big tube is the bore. The bore consists of a gradient coil, which is used for tuning the field of each scan. Inside of the gradient coil, is the body RF coil (what you can see). The body RF coil is Transmit/Receive (T/R). @2:00 - gradient doesn't produce the B1 field for the spin, the RF coil does @4:17 the 8 channel brain coil does not put off its own RF. It is a receive-only coil, not T/R (You can tell by the connector, as at least one of the large holes should be populated for it to be a transmit coil). Instead of the body RF coil listening to the atoms returning back to rest, the 8 channel brain coil is listening, giving a tighter FOV, generating a better resolution image. @7:12, it's backwards. The PC in the back processes and draws images, it sends it to operator console for viewing. The localizer is a "lower-quality" as it is an FSE (fast spin echo) scan, used for localization. GRE scans produce higher resolution images. @15:30 that is a gradient chiller, running cooled fluid through the gradient coil. The helium compressor is behind it against the wall. @16:20, the magnet is suspended inside the cryostat, quenching does run the potential of ruining the magnetic winding due to hotspots during quench and/or other problems. If this happens, you will need a new magnet. The 500k worth of damage he is speaking about in the video is pertaining to refilling the helium vessel. Fun fact, this magnet is active & passive shimmed. The "box" on the top of the magnet at 1:50 is used to shim using active current that interacts with a separate coil wound around the main coil.

[@TuncayAyhan]

Love the fact you are still able to make videos! Although it's not the content you used to make, it's great you are sharing your experiences with your audience. Thank you!

[@inanepunk475]

Welcome back! So glad you are recovering and starting to make videos again!

[@brucejobs]

Welcome back, we missed you. Great to see you creating content again. :) Thank you Sorry to hear about your injury :/

[@antond131]

Seeing you back made me genuinely happy. Take your time to get back to full health!

[@corkeyGmandance]

Seeing this posted made my day. Welcome back!

[@gabrielschirmbeck400]

I am a neuroscientist and this video was truly awesome. Thank you for bringing awareness for the issue of brain injury and the awesomeness behind therapy and research

[@chikinrasshu]

So glad that you are good and making videos again, hope the recovery goes well

[@jima1135]

I was just thinking about you earlier today and that I haven't heard from you lately, and then you released a video! Glad you're doing better.

[@socratesnarvaez4672]

Nice to see you pop up in my recommendations, I hope you are feeling better, I love your videos.