Lasers and Lights for Treating Pigmented Lesions



  • Pigmented lesions were initially treated with destructive non-selective lasers.

  • Now pigment selective Q-switched lasers used.

  • Pigmented skin lesions are exceedingly common.

  • Selective destruction of pigmented lesions relies on the theory of selective photothermolysis.

  • Melanin has a broad absorption spectrum with absorption steadily decreasing with increasing wavelength.

  • Several Q-switched lasers fall within the melanin absorption spectrum. Their nanosecond pulse duration is effective since it is shorter than the thermal relaxation time of melanin.


Laser Treatment Ruby Laser Thermal Relaxation Time Melanocytic Nevus Pigment Lesion 


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Copyright information

© Springer-Verlag London Limited 2011

Authors and Affiliations

  1. 1.Department of DermatologySkinCare PhysiciansChestnut HillUSA
  2. 2.Department of DermatologyBoston UniversityBostonUSA
  3. 3.Boston UniversityBostonUSA
  4. 4.Residency Training ProgramBostonUSA

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