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一项测定乳房组织在可见光和近红外区域内衰减特性的光学试验已有论述。总衰减系数在组织切片中直接测定,其值范围一般在10mm~(-1)～30mm~(-1)之间,该值在脂肪样本中比在腺纤维样本中稍高,并且随波长的增加而减小。散射相位函数在0.85到0.97范围内,散射的平均余弦峰向前加强,且在脂肪组织中比在腺纤维组织中显现更前。在所有组织中减小的衰减系数约为1mm~(-1)。吸收系数在光学切片中间按测定,在580nm处其典型值在0.1mm~(-1)和0.5mm~(-1)之间,在850mm处的吸收系数比该值低一个数量级。在不大于580nm
An optical test to determine the attenuation characteristics of breast tissue in the visible and near-infrared regions has been discussed. The total attenuation coefficient is determined directly in the tissue section and is typically in the range of 10 mm-1 to 30 mm-1, which is slightly higher in fat samples than in gland fibers and varies with wavelength Increase and decrease. The scattering phase function is in the range of 0.85 to 0.97 and the average cosine peak of scattering is strengthened forward and appears more preferentially in adipose tissue than in glandular fibers. The reduced attenuation coefficient in all tissues is about 1 mm -1. The absorption coefficient is determined in the middle of the optical section, typically at 580 nm at 0.1 mm-1 and 0.5 mm-1, and the absorption coefficient at 850 mm is an order of magnitude lower. Not more than 580nm