From CT, PET and MRI to the original X, a vast alphabetical arsenal of tools tells doctors what is going on inside the body. But despite their successes, these tools often fail to detect the subtle changes that signal the imminent onset of illness. Mischief at the molecular level often evades doctors’ current imaging and detection abilities. So for sensing such changes, biomedical scientists are taking a tip from chemists. Using a method known as Raman spectroscopy, medical detectives are moving ever closer to exploiting the power of light to improve disease detection.
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