30 Apr 15
3 edits
http://physicsworld.com/cws/article/news/2015/apr/30/portable-battlefield-mri-comes-out-of-the-lab
I am really seriously put-off by the big emphasis in that link on its military application.
I really wish they didn't even mention that.
But, still, once I get past that, this looks good to me!
01 May 15
Originally posted by humyA faraday cage holds off only electric fields. You could make something similar for magnetics if you used Mu-metal, which conducts magnetic field lines into itself and shields something from the magnetic field, but I have no idea how thick such metal would have to be to make a good shield big enough for the human body. Obviously it would be more than 2 meters long and a meter wide and high for use on humans.
but a Faraday Cage cannot be used for peacetime medical scanning.
It might also be possible to make a repelling shield similar to noise cancelling earphones for audio. You could see series of magnetic sensors coupled with reverse field coils that could null out external fields.
01 May 15
Originally posted by sonhouseThat is essentially what they are trying to do in the device in the article - or have plans to do that.
It might also be possible to make a repelling shield similar to noise cancelling earphones for audio. You could see series of magnetic sensors coupled with reverse field coils that could null out external fields.