> Somebody told me that they knew of a case where a hospital porter decided to push a gas cyclinder through the MRI room while the machine was on (shortcut?).
The trap is that they are pretty much never ‘off’, they are magnetic when not scanning.
This issue may be reduced with technology such as the Philips Blue Seal thing where you can remove (reduce?) the field at the flick of a switch. However things like this where the danger goes from being ‘always’ to ‘sometimes’ can actually increase accidents. It’ll be an interesting space to watch.
Most are superconducting electromagnets, so.. sort of? They have shipped full of liquid helium then get ramped up (or at least, this is how Siemens do it). With any luck they stay up for many years.
The trap is that they are pretty much never ‘off’, they are magnetic when not scanning.
This issue may be reduced with technology such as the Philips Blue Seal thing where you can remove (reduce?) the field at the flick of a switch. However things like this where the danger goes from being ‘always’ to ‘sometimes’ can actually increase accidents. It’ll be an interesting space to watch.
https://www.medgadget.com/2018/09/philips-helium-free-mri-sy...