title: Effects of tissue water content on the propagation of laser light during low-level laser therapy.
abstract: This work reports that the laser fluence rate inside porcine skin varied notably with the change of tissue water content under the same laser irradiation conditions. The laser fluence rate inside skin tissue samples with varying water content was measured using an optical fiber sensor, while the target was irradiated either by a low-level 635 or 830 nm laser (50 mW/cm2). It was demonstrated that the distribution of laser fluence rate inside the target is strongly affected by tissue water content and its profile is determined by the water content dependency of optical properties at the laser wavelength.
authors.forename: Soogeun
authors.initials: S
authors.lastname: Kim
authors.forename: Sungho
authors.initials: S
authors.lastname: Shin
authors.forename: Sungho
authors.initials: S
authors.lastname: Jeong
mesh_terms: D000818:Animals; D007834:Lasers; D008027:Light; D028022:Low-Level Light Therapy / Q000379:methods*; D008297:Male; D008962:Models, Theoretical; D055100:Optical Fibers; D055095:Optics and Photonics; D012867:Skin / Q000473:pathology* / Q000528:radiation effects*; D013552:Swine; D014867:Water / Q000737:chemistry*; D014945:Wound Healing
chemical_list: D014867:Water