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Whole-body magnetic resonance imaging at 0.05 Tesla

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Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#31
post #2

"The lower-power machine was much cheaper to manufacture and operate, more comfortable and less noisy for patients, and the final images after computational processing were as clear and detailed as those obtained by the high-power devices currently used in the clinical setting."

A cardboard box containing preprinted scan results would also be even cheaper and faster.

But some people actually like to have something that works.

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#32
post #24

A few months ago there were articles going around about how Samsung galaxy phones were upscaling images of the Moon using AI [0]. Essentially, the model was artificially adding landmarks and details based on its training set when the real image quality was too poor to make out details. Needless to say, AI upscaling as described in this article would be a nightmare for radiologists. 90% of radiology is confirming the…

The Samsung phone wasn’t a technological advancement, it was sheer fraud. A camera is supposed to take pictures of what it sees. Imagine going to a restaurant, ordering French onion soup, and getting a bowl of brown food coloring in water.

> Imagine going to a restaurant, ordering French onion soup, and getting a bowl of brown food coloring in water.

Welcome to England!

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#33
post #14

This is remarkable. 1800W is like a fancy blender, amazing to be able to do a useful MRI at that power. For anyone who is unaware, a standard MRI machine is about 1.5T (so 30x the magnetic strength) and uses 25kW+. For special purposes you may see machines up to 7T, you can imagine how much power they need and how sensitive the equipment is. Lowering the barriers to access to MRIs would have a massive impact on effec…

This reminded me of the recent request for startups proposal by Surbhi Sarna “A way to end cancer”. The proposal states that we already have a way (MRI) to diagnose cancer at very early stages where treatment is feasible but cost and scaling need to be tackled to make it widely accessible.

Something like this low power MRI could be a key part of enabling a transformation of cancer treatment.

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#34
post #24

A few months ago there were articles going around about how Samsung galaxy phones were upscaling images of the Moon using AI [0]. Essentially, the model was artificially adding landmarks and details based on its training set when the real image quality was too poor to make out details. Needless to say, AI upscaling as described in this article would be a nightmare for radiologists. 90% of radiology is confirming the…

The Samsung phone wasn’t a technological advancement, it was sheer fraud. A camera is supposed to take pictures of what it sees. Imagine going to a restaurant, ordering French onion soup, and getting a bowl of brown food coloring in water.

It's kinda like the classic Ebay scam where you buy a picture of the item instead of the item.

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#35

> We conducted imaging on healthy volunteers, capturing brain, spine, abdomen, lung, musculoskeletal, and cardiac images. Deep learning signal prediction effectively eliminated EMI signals, enabling clear imaging without shielding. So essentially, the neural net was trained to what a healthy MRI looks like and would, when exposed to abnormal structures, correct them away as EMI noise leading to wrong diagnostics? I w…

Seems like a huge and obvious red flag to me indeed. I can't imagine how the authors managed to not even mention the issue in the abstract. If the model is trained on healthy scans, well, yes, it will spit out healthy scans. The whole point of clinical radiology is to get enough precision to detect (potentially subtle) anomalies.

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#36
post #24

A few months ago there were articles going around about how Samsung galaxy phones were upscaling images of the Moon using AI [0]. Essentially, the model was artificially adding landmarks and details based on its training set when the real image quality was too poor to make out details. Needless to say, AI upscaling as described in this article would be a nightmare for radiologists. 90% of radiology is confirming the…

The Samsung phone wasn’t a technological advancement, it was sheer fraud. A camera is supposed to take pictures of what it sees. Imagine going to a restaurant, ordering French onion soup, and getting a bowl of brown food coloring in water.

> “A camera is supposed to take pictures of what it sees.”

Feels like that’s just a matter of expectations.

A phone used to be a device for voice communications. It’s right there in the Greek etymology, “phonē” for sound. But 95% of what people do today on devices called phones is something else than voice.

Similarly, if people start using cameras more to produce images of things they want rather than what exists in front of the lens, then that’s eventually what a camera will mean. Snapchat thinks of themselves as a camera company, but the images captured within their apps are increasingly synthesized.

(The etymology of “camera” already points to a journey of transformation. A photographic camera isn’t a literal room, as the camera obscura once was.)

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#37
I think this could be useful as a starting point for diagnostics - a cheaper, lower-power device massively lowers the barrier to entry to getting an MRI scan, even if it's not fully reliable. If it does find something, that's evidence a higher-quality scan is worth the resources. In short, use the worse device to take a quick look, if it finds anything, then take a closer look. If it doesn't find anything, carry on with the normal procedure.

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#38
post #24

A few months ago there were articles going around about how Samsung galaxy phones were upscaling images of the Moon using AI [0]. Essentially, the model was artificially adding landmarks and details based on its training set when the real image quality was too poor to make out details. Needless to say, AI upscaling as described in this article would be a nightmare for radiologists. 90% of radiology is confirming the…

The Samsung phone wasn’t a technological advancement, it was sheer fraud. A camera is supposed to take pictures of what it sees. Imagine going to a restaurant, ordering French onion soup, and getting a bowl of brown food coloring in water.

An MRI machine is a fancy 3D camera. Is this "3D Deep-DSP Model" so different from the processing Samsung did on their phones?

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#39
post #12

I can’t access the full paper, but from the abstract, is it accurate that they’re using ML techniques to synthesize higher-quality and higher-resolution imagery, and that’s the basis for their claim that it’s comparable to the output of a conventional MRI scan? Do clinicians really prefer that the computer make normative guesses to “clean up” the scan, versus working with the imagery reflecting the actual measurement…

They already use computers to make guesses to clean up the scan.

A core part of processing MRI is the compressed sensing algorithm .

Re: Whole-body magnetic resonance imaging at 0.05 Tesla

#40
post #36

Earlier quoted context omitted.

The Samsung phone wasn’t a technological advancement, it was sheer fraud. A camera is supposed to take pictures of what it sees. Imagine going to a restaurant, ordering French onion soup, and getting a bowl of brown food coloring in water.

> “A camera is supposed to take pictures of what it sees.” Feels like that’s just a matter of expectations. A phone used to be a device for voice communications. It’s right there in the Greek etymology, “phonē” for sound. But 95% of what people do today on devices called phones is something else than voice. Similarly, if people start using cameras more to produce images of things they want rather than what exists in…

Taking this thought to its logical conclusion: https://bjoernkarmann.dk/project/paragraphica
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