Evaluation of Diffuse Reflectance in Multi-layered Tissue for High Intensity Laser Therapy

Lee, Sang-Kwan; Youn, Jong-In

doi:10.3807/josk.2013.17.2.205

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…The optical coefficient values from the suggested results generally match those from relevant publications that used the same or near wavelengths [ 46 , 55 , 56 , 57 ]. At the same time, there could be some differences in the values owing to factors such as storage requirements and tissue preparation techniques [ 2 , 32 ].…”

Section: Discussionsupporting

confidence: 71%

Optical Characterization of Biological Tissues Based on Fluorescence, Absorption, and Scattering Properties

2022

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Optical diagnostics methods are significantly appealing in biological applications since they are non-destructive, safe, and minimally invasive. Laser-induced fluorescence is a promising optical spectrochemical analytical technique widely employed for tissue classification through molecular analysis of the studied samples after excitation with appropriate short-wavelength laser light. On the other hand, diffuse optics techniques are used for tissue monitoring and differentiation based on their absorption and scattering characteristics in the red to the near-infrared spectra. Therefore, it is strongly foreseen to obtain promising results by combining these techniques. In the present work, tissues under different conditions (hydrated/dry skin and native/boiled adipose fat) were distinguished according to their fluorescence emission, absorption, and scattering properties. The selected tissues’ optical absorption and scattering parameters were determined via Kubelka–Munk mathematical model according to the experimental tissue reflectance and transmittance measurements. Such measurements were obtained using an optical configuration of integrating sphere and spectrometer at different laser wavelengths (808, 830, and 980 nm). Moreover, the diffusion equation was solved for the fluence rate at the sample surface using the finite element method. Furthermore, the accuracy of the obtained spectroscopic measurements was evaluated using partial least squares regression statistical analysis with 0.87 and 0.89 R-squared values for skin and adipose fat, respectively.

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Section: Discussionsupporting

confidence: 71%

Optical Characterization of Biological Tissues Based on Fluorescence, Absorption, and Scattering Properties

2022

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“…Therefore, it is very important to determine the optical properties of multilayered skin tissue and to investigate how deeply the light can penetrate. There are many studies in the literature on the multilayered modelling of skin tissue by Monte Carlo simulation (see, for example, [12][13][14][15][16]). As the wavelength increases into the visible and near-infrared optical region of the spectrum, light can penetrate more deeply.…”

Section: Introductionmentioning

confidence: 99%

Determination of fluence rate distribution in a multilayered skin tissue model byusing Monte Carlo simulations

Arslan¹,

Pehlivanoz²

2019

Turk J Phys

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Information on light-tissue interaction is important for clinical applications of lasers. The Monte Carlo technique is one of the commonly used methods to simulate photon propagation and to describe energy absorption in biological tissues. In this study, fluence rate distributions of 633 nm and 830 nm light inside a multilayered skin tissue model have been investigated by using two different simulation software programs: GAMOS tissue optics plug-in and MCML. Results of the plug-in for the fluence rate distributions are in very good agreement with the ones from MCML for both of the wavelengths. This shows that GAMOS tissue optics plug-in can be utilized in simulation studies on the interaction of light in the phototherapeutic window within multilayered tissue models.

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Comparison of photobiomodulation therapy and suprascapular nerve-pulsed radiofrequency in chronic shoulder pain: a randomized controlled, single-blind, clinical trial

Ökmen

2017

Lasers Med Sci

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Shoulder pain can be difficult to treat due to its complex anatomic structure, and different treatment methods can be used. We aimed to examine the efficacy of photobiomodulation therapy (PBMT) and suprascapular nerve (SSN)-pulsed radiofrequency (RF) therapy. In this prospective, randomized, controlled, single-blind study, 59 patients with chronic shoulder pain due to impingement syndrome received PBMT (group H) or SSN-pulsed RF therapy (group P) in addition to exercise therapy for 14 sessions over 2 weeks. Records were taken using visual analog scale (VAS), Shoulder Pain and Disability Index (SPADI), and Nottingham Health Profile (NHP) scoring systems for pretreatment (PRT), posttreatment (PST), and PST follow-up at months 1, 3, and 6. There was no statistically significant difference in initial VAS score, SPADI, and NHP values between group H and group P (p > 0.05). Compared to the values of PRT, PST, and PST at months 1, 3, and 6, VAS, SPADI, and NHP values were statistically significantly lower in both groups (p < 0.001). There was no statistically significant difference at all measurement times in VAS, SPADI, and NHP between the two groups. We established that PBMT and SSN-pulsed RF therapy are effective methods, in addition to exercise therapy, in patients with chronic shoulder pain. PBMT seems to be advantageous compared to SSN-pulsed RF therapy, as it is a noninvasive method.

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Evaluation of Diffuse Reflectance in Multi-layered Tissue for High Intensity Laser Therapy

Cited by 5 publications

References 34 publications

Optical Characterization of Biological Tissues Based on Fluorescence, Absorption, and Scattering Properties

Optical Characterization of Biological Tissues Based on Fluorescence, Absorption, and Scattering Properties

Determination of fluence rate distribution in a multilayered skin tissue model byusing Monte Carlo simulations

Comparison of photobiomodulation therapy and suprascapular nerve-pulsed radiofrequency in chronic shoulder pain: a randomized controlled, single-blind, clinical trial

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