I tradizionali dispositivi laser CO2, sono altamente efficaci nello skin resurfacing, ma sono associati con tempi di recupero prolungati e rilevanti effetti negativi. La modalità non ablativa offre tempi di inattività ridotti e minori effetti collaterali, ma l’efficienza è limitata. Il nuovo manipolo laser CO2 frazionato produce una matrice di ferite microtermiche a profondità personalizzabile […]
Fractional 1320 nm Nd : YAG laser in the treatment of acne vulgaris: a pilot study
Acne vulgaris is a common skin condition, affecting over 85% of people. Because of its effect on quality of life, acne vulgaris is more than a merely physiological or cosmetic entity. Acne is caused by changes in the pilosebaceous units. Patients have excess sebum production and non-inflammatory follicular papules. Proliferation of Propionibacterium acnes may lead […]
Mapping pigmentation in human skin from multi-channel visible spectrum image by inverse optical scattering technique
Mapping pigmentation in human skin is expected to give useful information in reproducing skin color and enhancing the ability to diagnose various skin disease. In this research, maps of melanin, oxyhemoglobin and deoxy-hemoglobin in skin are estimated from multichannel visible spectrum image by using an inverse optical scattering technique. In the inverse optical scattering technique, […]
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 […]
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 […]
L'ottica della pelle umana
Viene presentata una revisione integrata del trasferimento della radiazione ottica nella pelle umana, finalizzata a sviluppare modelli utili per la foto-medicina. articolo completo Autori R. Rox Anderson John A. Parrish
The optics of human skin: Aspects important for human health
Human health can be strongly influenced by exposure to solar radiation. Interactions relevant for health take place mainly in the skin. In this context the optics of human skin is of the utmost importance. Reflection, scattering and absorption are the optical properties affecting the nature of these interactions. By combining a bio-optical model of human […]
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 […]
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 […]
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 […]