• Title/Summary/Keyword: Imitational Biological Tissue

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A Study on the Characteristics of Muscle Relaxation according to the Temperature Condition at the Surface of Imitational Biological Tissue (모의 생체조직의 표면온도 조건에 따른 근육이완 특성에 관한 연구)

  • Ko, Dong-Guk;Lee, Chan-Woo;Kim, Min-Soo
    • Journal of the Korean Society of Mechanical Technology
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    • v.20 no.6
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    • pp.770-775
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    • 2018
  • In this study, the characteristics of muscle relaxation were analyzed by the experimental and numerical method. A skin tissue was produced by imitational biological tissue using the agar powder, saline solution and sugar. The tissue was exposed to three types of wavelength-blue visible radiation(410 nm), red visible radiation(635 nm), and infrared ray(830 nm). The temperature results along the depth of tissue were measured according to the variation of light wavelength and irradiation time. The temperature change of the tissue shown up similar pattern regardless of the light wavelength kinds. The wavelength of infrared ray penetrated strongly into tissue between 3.2 mm and 11.4 mm. Also, the temperature change with the irradiation time was small, and the temperature value of the infrared ray was the largest. As a result, the muscle relaxation will occur mainly at the infrared wavelength.

A Study on the Boundary Condition for Analysis of Bio-heat Equation According to Light Irradiation (광조사에 따른 생체열 방정식의 해석을 위한 경계조건의 확립에 대한 연구)

  • Ko, Dong Guk;Bae, Sung Woo;Im, Ik-Tae
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.39 no.11
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    • pp.853-859
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    • 2015
  • In this study, the temperature change in an imitational biological tissue, when its surface is irradiated with bio-light, was measured by experiments. Using the experimental data, an equation for temperature as a function of time was developed in order to use it as a boundary condition in numerical studies for the model. The temperature profile was measured along the depth for several wavelengths and distances of the light source from the tissue. It was found that the temperature of the tissue increased with increasing wavelength and irradiation time; however, the difference in the temperatures with red light and near infrared light was not large. The numerical analysis results obtained by using the developed equation as boundary condition show good agreement with the measured temperatures.