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Brain-wide functional connectivity artifactually inflates throughout functional magnetic resonance imaging scans www.nature.com/articles/s41562-024-01908-6 Abstract Functional magnetic resonance imaging (fMRI) is a central tool for investigating human brain function, organization and disease. Here, we show that fMRI-based estimates of functional brain connectivity artifactually inflate at spatially heterogeneous rates during resting-state and task-based scans. This produces false positive connection strength changes and spatial distortion of brain connectivity maps. We demonstrate that this artefact is driven by temporal inflation of the non-neuronal, systemic low-frequency oscillation (sLFO) blood flow signal during fMRI scanning and is not addressed by standard denoising procedures. We provide evidence that sLFO inflation reflects perturbations in cerebral blood flow by respiration and heart rate changes that accompany diminishing arousal during scanning, although the mechanisms of this pathway are uncertain. Finally, we show that adding a specialized sLFO denoising procedure to fMRI processing pipelines mitigates the artifactual inflation of functional connectivity, enhancing the validity and within-scan reliability of fMRI findings.

My sister was wearing a special belt with a metal buckle. We were next to the MRI machine when I was removing the belt. The magnetic field was so strong it was pulling on the belt, like an invisible hand. It was a fascinating experience, but the MRI tech told me to move away from the machine. I asked the tech what would happen if the belt entered the MRI. She said it would not be possible for me to pull it out. She would have to hit the emergency shut off switch. But in order to restart the machine requires two engineering technicians all day. It's an expensive process. Normally, the MRI is left running all the time, even when the clinic is closed.

This mri is cost= Lamborghini

Entry level MRI machine starts at $225,000 and can go up to $500,000. These guys must really have deep pockets if they can afford to replace one.

I got my foot caught in the field, I couldn't get it out nor could I remove my shoes, so I had to SCRAM the machine. The hospital was less than sympathetic.

Is it okay to go for MRI. if you stent placed in your heart?

Came here by IdkSterling

The mri: you have lost your chair privileges

What a massive waste of helium for such a dumb video. Any other wastes of precious non renewable elements you have?

When it said "Your head here?" after seeing the stapler bounced around in there, it legit made me think that a human head would get tossed in and start bouncing around.

All metalheads watching this: 👀

I saw a clip of this on "M.R.I Machine // C.T Scan" by Little More Knowledge. Great video!

Me: accidentally forgetting to take off my belt before CT The magnet: 🤗

these comments are amazing 🤣🤣🤣🤣🤣😅💉💉

Dr. Etzel is super wise and inspirational. With her boots-on-the-ground experiences at multiple scales and thinking about and looking very carefully at the data, she's a treasure to our field.

They're back!

That is an extremely expensive machine. Don’t break it. You will get fired, maybe sued.

!!!!!!!!!!!!!!!!!! Nnnnnnn

!!!!!!!!!!!!😮 No

Patients with Neuralink chips entering MRI be like: 🤯

Nunca faça isso!!!!!!!!!!!!!!!!!!!!!😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😮😅

I just spent 45 minutes inside one of those things , the loud noise they generate is hideous , like war of the worlds movie sounds , clamped in and pushed inside a tube for 45 minutes listening to that was not fun

I was drawn to this video for some reason

Se o metal te pega, pega a ressonância magnética de criança 😂😂😂😂😂😂😂😂😂😂😂!!!!!!!!!!!!!!!

Scanner physically

What was the PPE? Was there plexiglass or something between you guys and the machine?

Question, shouldn't magnets this powerful be strong enough to rip the iron out of your body?

MRI scanning developed at Nottingham University in the UK.

Woow

Quietest MRI machine

Considering that office chairs can heavily explode, this was a extremely dangerous thing to do.

Neuralink mfs when i put them in an mri machine:

Israel claimed Hamas kept guns nicely arranged less than 1 foot from an MRI Machine...

There should be a off switch or something you can put in front that’s not magnetic

Came here after watching Michael's DONG

i once worked at a factory that refurbished medical trailers with ct scanners and mri machines. every time i would sweep around the gantry, i would have to keep a real tight grip on the metal broom so it wouldn't get sucked in and launched. sometimes i would grab the handle real tight and just hold the broom up to it and watch it move on its own. definitely not safe, but god damn was it worth it.

When Doctors drink too much at office Xmas party

I forgot to take my tongue piercing out

What is the oil change process like for these tomography machines?

people should already know not to bring metal into a mri machine. It also falls on doctors to make sure there paicent dont have any thing metal with them by asking them befor taking them back for a MRI

How much does this gold filtration machine cost

"oh no i forgot my buttplug, eh what could go wro-"

My Cat's pet chip Implant still worked after being twice in an MRI. They told us it would likely be damaged and he'd need a new one but that was not the case.

"Couldn't even afford 4 dollars worth of magnets and I mean 4 million dollars, bought em anyway. Shipped it to our house and played around with it."

Damn imagine going in there and your phone turns into a 200 pound weight in your pocket

Would be interesting to see the effects of tattoo ink in skin samples.

That's really stupid to do with a pressurized gas cylinder. Lots of office have chairs exploded by lesser abuse.

“Your head here?” Yeah well I’m pretty sure my head isn’t a piece of metal

Watching this thinking about the woman who went in with a metal butt plug. Rip. 😔

How did they get the wrench out? Magnets can't be turned on and off. Did they all get together to pull the wrench out?