Universitat Autònoma de Barcelona, Grup d'Òptica, Physics Department, Bellaterra, Spain.
Université Paris-Saclay, LPICM, CNRS, École Polytechnique, Palaiseau, France.
J Biomed Opt. 2017 May 1;22(5):56004. doi: 10.1117/1.JBO.22.5.056004.
We present mathematical formulas generalizing polarization gating (PG) techniques. PG refers to a collection of imaging methods based on the combination of different controlled polarization channels. In particular, we show how using the measured Mueller matrix (MM) of a sample, a widespread number of PG configurations can be evaluated just from analytical expressions based on the MM coefficients. We also show the interest of controlling the helicity of the states of polarization used for PG-based metrology, as this parameter has an impact in the image contrast of samples. In addition, we highlight the interest of combining PG techniques with tools of data analysis related to the MM formalism, such as the well-known MM decompositions. The method discussed in this work is illustrated with the results of polarimetric measurements done on artificial phantoms and real ex-vivo tissues.
我们提出了广义偏振门控（PG）技术的数学公式。PG 是指基于不同受控偏振通道组合的成像方法的集合。具体来说，我们展示了如何使用样品的测量 Mueller 矩阵（MM），仅通过基于 MM 系数的解析表达式来评估广泛的 PG 配置。我们还展示了控制用于 PG 计量的偏振态的螺旋性的重要性，因为该参数会影响样品的图像对比度。此外，我们强调了将 PG 技术与与 MM 形式相关的数据分析工具相结合的重要性，例如众所周知的 MM 分解。本文讨论的方法通过对人工模型和真实离体组织进行的偏振测量结果进行说明。
