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首页> 外文会议>International Multi-Conference on Industrial Engineering and Modern Technologies >Numerical Simulation of Low-Coherence Radiation Propagation in Turbid Media and Structural Image Reconstruction in Endoscopic Optical Coherence Tomography with Allowance for Speckle Fluctuations
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Numerical Simulation of Low-Coherence Radiation Propagation in Turbid Media and Structural Image Reconstruction in Endoscopic Optical Coherence Tomography with Allowance for Speckle Fluctuations

机译：低相干辐射在混浊介质中传播的数值模拟和内窥镜光学相干层析成像中结构图像的重构（允许斑点波动）

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摘要

A method of Monte Carlo simulation of low-coherence radiation propagation in turbid media with consideration of speckle noise (the result of mutual interference of secondary spherical waves) is described. The process of photon propagation within investigated object, such as biological tissue, includes the following steps: the photon injection, mean free path determination, the verification of the fulfillment of the boundary condition, the absorption and scattering. Structural image reconstruction in optical coherence tomography (OCT) with consideration of speckle fluctuations is made by summation the statistical weight of the beam coming out of the investigated object inside the detector area with the intensity of a series of pixels of the current A-scan. The key feature of the presented method is the description of the investigated object geometry. Three-dimensional array of voxels combined into parallelograms, and the border cross checking is carried out by using an improved Smith algorithm. The described method can be used to obtain high-quality endoscopic structural OCT images of body cavities and tracts (diagnosis of the respiratory tract, cardiovascular system, gastrointestinal tract, genitourinary system, etc.).
机译：描述了一种考虑斑点噪声（次级球面波相互干扰的结果）的低相干辐射在浑浊介质中传播的蒙特卡罗模拟方法。光子在被研究物体（例如生物组织）中的传播过程包括以下步骤：光子注入，平均自由程确定，边界条件的满足性验证，吸收和散射。考虑相干斑点波动的光学相干断层扫描（OCT）中的结构图像重建是通过将检测器区域内来自被调查对象的光束的统计权重与当前A扫描的一系列像素强度相加而得出的。所提出的方法的关键特征是所研究对象几何形状的描述。三维像素阵列组合成平行四边形，并使用改进的史密斯算法进行边界交叉检查。所描述的方法可用于获得体腔和管道的高质量内窥镜结构OCT图像（诊断呼吸道，心血管系统，胃肠道，泌尿生殖系统等）。

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