Multiple pass ultrasound tightening of skin laxity of the lower face and neck.

Background: Skin laxity is a common complaint of patients who request skin rejuvenation. Radiofrequency and infrared light are widely used for nonablative treatment of skin laxity. Intense focused ultrasound (IFUS) has been investigated as a tool for the treatment of solid benign and malignant tumors for many decades but is only now beginning to emerge as a potential noninvasive alternative to conventional nonablative therapy.

Fractional rejuvenation using a novel bipolar radiofrequency system in Asian skin.

Background: Fractional photothermolysis (FP) constitutes an effective modality of skin resurfacing by delivering thermal energy into multiple arrays of microscopic treatment zones. Radiofrequency (RF) can induce volumetric heating of dermis depending on electrical properties of target tissue.

Objectives: To evaluate the efficacy and safety of a novel bipolar RF-based fractional device for the treatment of photoaged Asian faces.

Treatment of melasma in Asian skin using a fractional 1,550-nm laser: an open clinical study.

Background: Melasma is a common hyperpigmentation disorder that can cause refractory cosmetic disfigurement, especially in Asians. Fractional photothermolysis (FP) has been reported to be effective for the treatment of melasma, despite small study populations and short follow-up periods.

Objective: To evaluate the efficacy and safety of FP for the treatment of melasma in Asians.

Fractional photothermolysis for the treatment of acne scars: a report of 27 Korean patients.

Objectives: Atrophic post-acne scarring remains a therapeutically challenging condition despite various currently available technologies. Fractional photothermolysis (FP) is a novel concept of cutaneous resurfacing which induces non-contiguous microscopic thermal injury. The aim of this study is to evaluate the safety and efficacy of FP in the treatment of acne scars in Asian patients.

Minimal heating dose: a novel biological unit to measure infrared irradiation.

Background And Objective: Infrared (IR) rays, which comprise approximately 40% of the solar radiation which reaches the earth's surface, have received relatively scant attention. As no standard method has yet been agreed upon for the biological evaluation of IR irradiation, the objective of this study is to suggest a new unit for IR irradiation.

Methods: The skin temperature of 38 Korean volunteers was measured after IR irradiation with varying irradiance.