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Getty Images Helium is used to cool the magnets used in MRI scanners There's no central wholesale price for the gas, because it is not traded on global markets. Phil Kornbluth, the founder of ...

For conventional MRI scanners, acquiring high-resolution images requires cooling the magnets to around -270 °C. To achieve this, the magnets are immersed in around 2,000 litres of liquid helium ...