BERLIN, Nov. 4 -- German researchers are developing a technique for diagnosing rheumatoid arthritis using laser light that they say takes only a few minutes to give a result and should pick up the condition earlier than current tests. Initial tests have shown the exam was able to accurately identify more than 80 percent of cases, and a clinical study is set to begin before the end of this year, Professor Juergen Beuthan of the Berlin Free University's institute for medical physics and laser medicine told Reuters Health Thursday. Beuthan said he was optimistic the test will give medics an...Read full articleRelated content from Photonics MediaArticlesQuantum-Confined Mediums Scrutinized for Narrow Linewidth LasingOn-chip laser diodes based on quantum dot (QD) and quantum well (QW) semiconductor materials are strong candidates for applications that rely on stable laser emissions with narrow linewidth. 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