The highly sensitive magnetic field sensor. (Photograph: ETH Zurich / Peter Rüegg)
Researchers have succeeded in measuring tiny changes in strong magnetic fields with unprecedented precision. In their experiments, the scientists magnetised a water droplet inside an MRI scanner, a device that is used for medical imaging. They were able to detect even the tiniest variations of the magnetic field strength within the droplet. These changes were up to a trillion times smaller than the 7 tesla field strength of the MRI scanner used in the experiment.
“Until now, it was possible only to measure such small variations in weak magnetic fields,” says Klaas Prüssmann, Professor of Bioimaging at ETH Zurich and the University of Zurich...
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