click on the image for an animation of the full series
The above are from a 3 tesla MRI scanner, the standard type you are
likely to see in a hospital.
The image below is from one of my scans on their 7 tesla scanner,
one of the strongest field medical MRI scanners in the world I
You can really see the difference in detail
How MRI works
I found it pretty difficult to figure out the basics of how MRI scanners
work; because it is of course a very complex subject but probably mostly
because there is not much info out there that the lay person can
understand. It is well worth doing though as it is real
fascinating stuff. They involve super conducting magnets, quantum
physics, near absolute zero temperatures and some mind blowing
concepts.....what's not to like?
Of course to truly understand it all takes a super human brain, but to
understand the basic concept of how they work can be done by anyone
willing to find out.
- just a taster of how extraordinary they are; watch THIS
animation of how the image is produced
(the actual result you get from an MRI scanner just looks like a
strange splodge - this is called K-Space, each pixel in K-space relates
to a simple sine wave, all these sine waves when added together produces
the final image - all to do with fourier transform
which is explained really well HERE
Below are links to some good sources of info I did find - The video
series is very good for how magnetic resonance works but I found it
confusing when it came to the image scanning and traversing K space etc.
If there is enough interest in this page and people seem to be having
the same problems I did understanding this, I may have a try at
explaining it here - so let me know if this would be of interest/use at
I found these videos to be very good - http://www.magritek.com/videos.html
Some good info here - http://www.simplyphysics.com/MRIntro.html
more info here - http://www.revisemri.com/tutorials/
Wikipedia entry on MRI I also found helpful - http://en.wikipedia.org/wiki/Mri
used to be called N.M.R.I. standing for Nuclear Magnetic Resonance
Imaging but the use of the word nuclear scared people as they don't
understand what it actually means and so they were re named
M.R.I.. It has been suggested that this name change has saved
countless lives as it no longer put patients off going for the scan.
If you found this interesting,
you may also like to have a look at my page on genetics - HERE