Medical Lasers

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Fig. 4. Histological analysis of photoaged ex vivo human skin after fractional microneedle radiofrequency (FMRF) treatment. (A, B) H&E staining of UV-A irradiated skin revealed solar elastosis and hyalinization of collagen on the upper dermis (×100). (C) A single pulse-type FMRF treatment induced microthermal zones (indicated by yellow arrows), which induced the generation of thicker collagen bundles (H&E, ×100). FMRF, fractional microneedle radiofrequency; H&E, hematoxylin-eosin.
Medical Lasers; Engineering, Basic Research, and Clinical Application 2021;10:161~169 https://doi.org/10.25289/ML.2021.10.3.161
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