How does MRI work? Jerome Maller explains
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- Опубліковано 9 лют 2025
- Jerome Maller is a neuroscientist based at Monash whose special area is using Magnetic resonance imaging (MRI) for brain imaging. Here, he explains the physics and why it's particularly useful for neuroscience. www.maprc.org.au/
The best explanation I've found yet! Thank you.
BEST EXPLANATION THERE IS!
Wow that was an amazing explanation - thank-you so much
Very good this helped ma a lot, many thanks
Thank you for making it so easy to understand. Very much appreciated.
great job
Bravo ! 👍
Super video!
Some corrections from an old timey tech
Not just water makes the image- fat too- and materials that are not water and/or not fat for contrast
I think you meant north-south and south-north when describing parallel/antiparallel
"spinning" is not the same as "precessing"- a spinning top, as gravity starts to overcome it, starts to wobble around its original vertical axis- that wobble (not the spin) is the precession
He does not describe the spin echo sequence adequately- there is more than a 90deg flip- after a pause ("tau"), there is another flip of 180deg in spin echo Never is just a 90deg flip radio pulse used
No mention here of radio waves, radio frequencies, just antennas- as if the hydrogen is detected in some mysterious way- a grave error
Not University-worthy
Dear eppurse,
Reply from Jerome Maller: Thankyou for your comments. This video was intended as a very basic introduction to MRI as a general response to the questions posed by many of the subjects I have been involved in scanning over the years.Hence, mentioning a 180 degree flip would necessitate introducing terms such as phasing/dephasing and spin-echo (and then GRE). On that note, I do not mention radio waves or RF as that is venturing into often confusing detail. If I went into that depth, I would also touch upon k-space, FFT, coil design, TR, TE, TI, T1, T2, EPI, and the various types of acquisition techniques which are all beyond the intended scope of the video.