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Related Experiment Video

Updated: May 26, 2026

In Vivo Two-Color 2-Photon Imaging of Genetically-Tagged Reporter Cells in the Skin
05:45

In Vivo Two-Color 2-Photon Imaging of Genetically-Tagged Reporter Cells in the Skin

Published on: July 11, 2019

Visualizing radiofrequency-skin interaction using multiphoton microscopy in vivo.

Tsung-Hua Tsai1, Sung-Jan Lin, Woan-Ruoh Lee

  • 1Department of Dermatology, Far Eastern Memorial Hospital, Taipei, Taiwan. tsaitsunghua@yahoo.com.tw

Journal of Dermatological Science
|January 3, 2012
PubMed
Summary
This summary is machine-generated.

Non-linear optics like multiphoton microscopy non-invasively image radiofrequency skin tightening. This study reveals collagen disruption and regeneration, explaining the mechanism of nonablative skin tightening.

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Area of Science:

  • Biomedical Optics
  • Dermatology
  • Tissue Engineering

Background:

  • Aging leads to redundant skin laxity.
  • Radiofrequency (RF) therapy offers nonablative skin tightening via deep dermal heating.
  • The precise effects of RF on tissue and remodeling require detailed investigation.

Purpose of the Study:

  • To assess non-linear optics, specifically multiphoton autofluorescence and second harmonic generation (SHG) microscopy, for real-time, non-invasive imaging of radiofrequency-tissue interactions.
  • To investigate the immediate and long-term effects of RF treatment on skin structure and collagen remodeling.

Main Methods:

  • Utilized an electro-optical synergy (ELOS) device for radiofrequency (RF) skin irradiation on nude mouse models.
  • Employed multiphoton microscopy to evaluate skin changes immediately and one month post-treatment.
  • Correlated multiphoton microscopy findings with histological examinations.

Main Results:

  • Second harmonic generation (SHG) signals negatively correlated with RF passes, indicating immediate collagen structural disruption due to thermal damage.
  • After one month, increased SHG signals above baseline demonstrated collagen regeneration and remodeling.
  • Histological analysis supported the multiphoton microscopy findings regarding collagen changes.

Conclusions:

  • Multiphoton microscopy enables non-invasive, in vivo imaging and quantification of dermal heating during RF treatment.
  • This technique allows detailed monitoring of tissue reactions and collagen remodeling processes.
  • The findings elucidate the mechanism behind nonablative skin tightening.