Portable devices with painless laser beams could soon replace X-rays as a non-invasive way to diagnose disease. Researchers say that the technique could become widely available in about five years. The method, called Raman spectroscopy, could help spot the early signs of breast cancer, tooth decay and osteoporosis.
Scientists believe that the technology would make the diagnosis of illnesses faster, cheaper and more accurate. Raman spectroscopy is the measurement of the intensity and wavelength of scattered light from molecules.
It is already being used in the chemical and pharmaceutical industries. For instance, Raman lasers are used to measure flame characteristics. By studying how fuels burn, pollution from the products of combustion can be minimised.
Michael Morris, a chemistry professor at the University of Michigan, US, has been using Raman for the past few years to study human bones.
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