Cancer

The growing menace of HPV‑related throat and mouth cancers

There's a new cancer epidemic on the rise. It's an aggressive throat and mouth cancer caused by the human papillomavirus (HPV)—the same sexually transmitted virus that leads to cervical cancer—but it's affecting mostly ...

Dentistry

Japan tooth patch could be end of decay

Scientists in Japan have created a microscopically thin film that can coat individual teeth to prevent decay or to make them appear whiter, the chief researcher said.

Other

Laser treatment can make your brown eyes blue

Just like the old Crystal Gayle song, a new laser technology could soon allow you to turn those boring brown eyes of your to a rich and beautiful blue. But you better make sure that blue eyes are what you really want because ...

Surgery

New non-invasive treatment of basal cell carcinoma

Research conducted by H. Ray Jalian, M.D., Mathew M. Avram, M.D., J.D., Kelly J. Stankiewicz, M.D., Joshua D. Shofner, M.D., and Zeina Tannous, M.D. was selected as Editor's Choice for the January 2014 issue of Lasers in ...

Diseases, Conditions, Syndromes

Trial to test laser acupuncture treatment for osteoarthritis

(PhysOrg.com) -- The potential for laser acupuncture to provide painless and effective treatment for osteoarthritis knee pain is being put to the test in a clinical trial beginning in Sydney.

Surgery

If you're considering cosmetic surgery...

(HealthDay)—More than 17 million cosmetic procedures are performed in the United States each year. Most of these are minimally invasive, designed to improve your appearance in subtle ways without the surgery, stitches and ...

Neuroscience

Resetting addicted brain: Laser light zaps away cocaine addiction

By stimulating one part of the brain with laser light, researchers at the National Institutes of Health (NIH) and the Ernest Gallo Clinic and Research Center at UC San Francisco (UCSF) have shown that they can wipe away addictive ...

Dentistry

Painless dental lasers can render teeth cavity-resistant

Almost as soon as lasers were invented in the 1960s, curious dentists wondered if these powerful forms of light could be used on teeth, though those early lasers were much too crude for any useful dental work.

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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