The utilities of lasers in medical treatments consist mainly of photothermal therapy and pdt today the laser is applied in both cases to almost all disciplines of medicine including dermatology ophthalmology dentistry otolaryngology gastroenterology urology gynaecology cardiovascular system neurosurgery and orthopaedics figure 6 although photothermal therapy still plays a major role in medical laser treatment pdt has been established as a treatment modality for a . Lasers were developed out of einsteins theories but the first work ing device was not produced until 1960 since then they have found applications in many areas of medicine and hold promise for many more this book has been written to provide a basic found ation on lasers what they are how they work and what they can do for the . The special properties of lasers make them much better than sunlight or other light sources at targeting medical applications each laser operates within a very narrow wavelength range and the light emitted is coherent they can also be very powerful the beams can be focused to a very small point giving them a high power density these properties have led to lasers being used in many areas of medical diagnosis and treatment
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