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Transcript of Lasers
Karim Mahmoud Abo El-Ela L ight
A mplification by
E mission of
R adiation &
Dermatology Does it have to be
visible light? The Different Modes Continuous Mode
Q-Switched Mode So what are the components
of a laser? Let's take a look at
how it works! Provides initial energy
to the laser using means
such as electric discharges,
flash lamps and chemical reactions. Can be:
liquid [dye lasers]
gas [Carbon Dioxide, Argon]
solid crystals/glass [YAG, Sapphire]
semi-conductor [laser diode] Relating lasers to
dermatology. Main uses of lasers in cosmetic surgery
include: Fine Lines and Wrinkles
Acne and Acne Scars
Warts and Mole Removal Ablative Non-ablative Affects the top layer of the skin. Works on the deep part of the skin
leaving the surface untouched. Carbon Dioxide
Nd:YAG Selective Photothermolysis Light Heat Destruction Water Melanin Hemoglobin How does it work? Addressed through different colors. Uses Produces Executes Water affects the collagen and elastin fibers, tightening the skin. Targets: Melanin for whitening and hair removal. Hemoglobin for vascular treatments. Safety It is very important that laser embedded devices are used by qualified users who know all the safety precautions.
Laser devices should be turned off when
not in use and should never be aimed
directly towards the eyes of any
living creature as it may
permanently damage them.
[except LASIK by professionals] Thank You for your time. Stimulated Emissions? Deeper??? Chromophores?? beta-Carotene chemical structure Beyond Visibility Fluence/Power Intensity The rate a number of particles intersect with a unit area. Main Considerations:
Diagnosis of problem
Type of laser
Power vs Time vs Comfort