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首页> 外文期刊>Applied optics >Imaging very-low-contrast objects in breastlike scattering media with a time-resolved method
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Imaging very-low-contrast objects in breastlike scattering media with a time-resolved method

机译：使用时间分辨方法在乳状散射介质中成像极低对比度的物体

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摘要

An investigation was performed of the effectiveness of a time-resolved method for imaging very-low-contrast features embedded in highly scattering media. Experiments employed slabs of breastlike material into which were inserted small cylindrical objects having either a scattering or an absorption coefficient of 4, 2, 1.5, and 1.1 times greater than the surrounding medium. An attempt was made to quantify the degree of contrast produced by each object. The results indicate that time-gating is far more effective at enhancing the contrast of the scattering inhomogeneities than of the absorbing inhomogeneities. This observation is shown to agree with a diffusion-based model, which also predicts that time-gating can decrease the contrast of absorbing inhomogeneities unless very short time-gates can be employed. # 1997 Optical Society of America
机译：对时间分辨方法对嵌入高散射介质中的极低对比度特征进行成像的有效性进行了研究。实验采用了类似乳腺材料的平板，在其中插入了散射或吸收系数比周围介质大4倍，2倍，1.5倍和1.1倍的小圆柱形物体。试图量化每个物体产生的对比度程度。结果表明，时间门控在增强散射不均匀性的对比度方面比吸收不均匀性要有效得多。该观察结果表明与基于扩散的模型一致，该模型还预测，除非可以采用非常短的时间门，否则时间门控可以降低吸收不均匀性的对比度。 ＃1997美国眼镜学会

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