There is some renewed interest in low field scanners. Past four decades have mainly been pushing for higher fields to improve SNR. But low field has a few advan

There is some renewed interest in low field scanners. Past four decades have mainly been pushing for higher fields to improve SNR. But low field has a few advantages: - no need for superconducting magnets. This is a big win for developing countries and portable systems. - better geometric accuracy. While not an show stopper as it can be corrected for, but low field exhibits better geometric accuracy as you move away from isocenter, which is of extra concern with e.g. radiotherapy applications. - more patient comfort as lower field strengths need less strong gradients thus less chance for PNS (involuntary muscle twitches due electric fields induced in the nerves)