Portable cancer detectors?

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 A thin, stretchable film that coils light waves like a Slinky could lead to a portable smart phone-sized device for more precise, less expensive monitoring for cancer survivors, scientists say.


The film provides a simpler, more cost-effective way to produce circularly polarised light, an essential ingredient in the process that could eventually provide an early warning of cancer recurrence. "More frequent monitoring could enable doctors to catch cancer recurrence earlier, to more effectively monitor the effectiveness of medications and to give patients better peace of mind," said Nicholas Kotov of the University of Michigan.