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Measurement of inner ear blood flow by laser Doppler flowmetry: theoptical characteristics and a flow model study of the inner ear,

机译:激光多普勒血流仪测量内耳血流量:内耳的光学特性和血流模型研究,

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Abstract: Laser Doppler flowmetry has widely been used to investigate the real time changes of the local blood flow in the inner ear. However the optical properties of the cochlea have not thoroughly been investigated. We have investigated the optical characteristics of the bony layer of the guinea pig cochlea by means of an integrating sphere and determined the absorption and scattering coefficients. A Delrin plate with approximately the same optical properties as the bony layer was used as a model in some of the measurements. In a flow model the geometrical conditions of the cochlea were studied. The flow model consists of a single capillary and the Doppler shifted signals were measured by a single optical fiber. Results show, the changes of the Doppler shifted signals were related to the distance between the photodetector and the scattering medium. From our results we can conclude that the laser Doppler measurements include information on the blood flow in structures deeper than 1 mm below the bone surface (guinea pigs). !15
机译:摘要:激光多普勒血流仪已被广泛用于研究内耳局部血流的实时变化。然而,耳蜗的光学性质尚未被彻底研究。我们已经通过积分球研究了豚鼠耳蜗骨层的光学特性,并确定了吸收系数和散射系数。在某些测量中,将具有与骨层大致相同的光学特性的Delrin板用作模型。在流动模型中,研究了耳蜗的几何条件。流动模型由单个毛细管组成,多普勒频移信号由单个光纤测量。结果表明,多普勒频移信号的变化与光电探测器和散射介质之间的距离有关。根据我们的结果,可以得出结论,激光多普勒测量包括在骨表面以下(豚鼠)深于1毫米的结构中的血流信息。 !15

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