Ablation and Thermal Depths in VSP Er:YAG Laser Skin Resurfacing

The list of indications for which Variable Square Pulse (VSP) Er:YAG laser systems can be used is continuously expanding. For example, ablative fractional resurfacing treatments performed with the VSP Er:YAG laser have good clinical outcomes and significantly shorter recovery times and adverse effects compared with traditional ablative laser skin resurfacing. Recently, an Er:YAG laser operating […]

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The Appearance of Human Skin

Skin is the outermost tissue of the human body. As a result, people are very aware of, and very sensitive to, the appearance of their skin. Consequently, skin appearance has been a subject of great interest in several fields of science and technology. As shown in Figure 1, research on skin appearance has been intensely […]

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Determination of human skin optical properties from spectrophotometric measurements based on optimization by genetic algorithms

We present an initial study on applying genetic algorithms (GA) to retrieve human skin optical properties using visual reflectance spectroscopy (VRS). A three-layered skin model consisting of 13 parameters is first used to simulate skin and, through an analytical model based on optical diffusion theory, we study their independent effects on the reflectance spectra. Based […]

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Optical signal degradation study in fixed human skin using confocal microscopy and higher-harmonic optical microscopy

Confocal and nonlinear optical microscopies have been applied for dermatological studies because of their capability to provide sub-surface three-dimensional images with sub-μm spatial resolutions. Optical signal degradation as the imaging plane being moved toward deeper regions in skin specimens is the key factor that limits the observation depth for the laser scanning based linear or […]

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Parameters for the New FRAC3® Nd:YAG Laser Skin Treatment Modality

A novel self-induced, non-ablative, threedimensional fractional FRAC3® method for skin treatments is described. The method utilizes the short pulse duration and high peak power density of Accelera mode, Nd:YAG laser pulses. The Accelera Nd:YAG pulses produce a three-dimensional fractional pattern in the epidermis and dermis, with damage islands that are predominantly located at the sites […]

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11/13 – Macchie scure della pelle – ipermelanosi

Le macchie scure della pelle (ipermelanosi) possono avere diverse origini, metaboliche o autoimmuni. Le cause più frequenti nella formazione delle macchie cutanee possono essere: una scorretta esposizione al sole o alle lampade abbronzanti, il melasma gravidico, l’assunzione di estroprogestinici (pillola-cerotto), l’assunzione di farmaci fotosensibilizzanti, la predisposizione genetica. Le macchie di sole sulla pelle sono sempre […]

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11/06 – Piega di espressione

Le pieghe di espressione si manifestano anche in un viso giovane per un’azione riflessa dei muscoli facciali. Alcune abitudini, come la contrattura della bocca, l’ammiccamento frequente degli occhi, il ravvicinare le sopracciglia alla radice del naso, le posizioni prolungate assunte durante il sonno, determinano pieghe dermiche che con il tempo e con l’avanzare dell’età, si […]

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11/05 – Fibroma cutaneo

Il fibroma cutaneo è una neo formazione benigna che può insorgere sulla pelle. L’insorgenza del fibroma, chiamato anche dermatofibroma, è preceduta da un piccolo trauma circoscritto, causato ad esempio da una puntura d’insetto. La reazione infiammatoria che ne consegue è una produzione abnorme di fibroplasti che producono eccesso di fibre e collagene che portano alla […]

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