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Question... how many T's is typically produced by an MRI?
Nice question there. There are different versions for example 7T MRI by Siemens.
Or this one:
https://medcom.uiowa.edu/theloop/research/7-tesla-mri-installed
7 Tesla Whole Body Scanner, manufactured by GE Healthcare and weighing 42 tons, or the equivalent of six adult male elephants, has found its home on the UI campus. The UI is one of only about 20 research institutes in the United States - and only about 40 worldwide - with this type of instrument.
edit: snip from that site:
How strong is the magnet? When an electric current is passed through the superconducting magnet's specialized coils (made of niobium-titanium), a strong, uniform magnetic field forms. The magnetic field strength is measured in Tesla (T). Most MRI scanners used for clinical purposes have field strengths of 1.5 or 3 Tesla. The new research scanner has a 7 Tesla field. (By comparison, the Earth's magnetic field is approximately 3.1×10^-5 Tesla.)
Once the scanner is energized, it will remain a magnet without any additional energy being used as long as it stays extremely cold. Liquid helium, which boils at 4.2K is used to keep the scanner cold.