Biomedical devices are the most advanced technology that some of us are likely to come into contact with, and often have the intimidating size to match. MRI scanners fill entire rooms, for example, with space for patients inside and cooling for the giant magnets. Increasingly, however, biomedical devices are becoming smaller because of miniaturisation. Tiny sensors, such as those developed by RV Magnetics, are shrinking thanks to incredibly thin 'microwires' that react to physical qualities such as heat.
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