Laser-Skin Physics: Photothermolysis, Pigmentation, Diagnostics & Tattoo Removal

A comprehensive guide to laser biophysics, skin optics, and pigment management. This lesson explores epidermal and dermal remittance, chromophores (hemoglobin, melanin, water), and the water-selective fluence-dependent continuum. You will master selective photothermolysis, thermal relaxation time (TRT), photoacoustic phenomena, and melanogenesis across Fitzpatrick skin types. The lesson covers diagnostic dermoscopy to differentiate superficial, deep dermal, and mixed lesions, providing step-by-step protocols for melasma management, post-inflammatory hyperpigmentation (PIH) prevention, and wavelength selection for laser tattoo removal.

– Optical biophysics: epidermal/dermal remittance and key chromophores (melanin, hemoglobin, ECM)
– Fundamentals of laser-skin interactions and light propagation
– The water-selective fluence-dependent continuum in laser therapy
– Clinical laser effects: pigment removal, epidermal renewal, and dermal remodeling
– Selective photothermolysis: thermal relaxation time (TRT) and photoacoustic mechanisms
– Melanogenesis: melanocyte function, pigment maturation stages, and the Fitzpatrick scale
– Diagnostic dermatoscopy: differentiating superficial, deep dermal, and mixed lesions
– Melasma treatment frameworks: mechanisms, target goals, and protocol planning
– Molecular mechanisms of Post-Inflammatory Hyperpigmentation (PIH)
– Safety precautions: pre/post-treatment protocols and parameter customization
– Laser tattoo removal: wavelength selection, efficacy, and pulse aggressiveness.