论文标题
定量相位对比成像：定性相位对比与相检索算法之间的桥梁
Quantitative phase-contrast imaging: a bridge between qualitative phase-contrast and phase retrieval algorithms
论文作者
论文摘要
在过去的五十年中，迭代阶段检索方法吸引了整个研究界的大量兴趣，作为一种非间接计量学方法，可从一个（或更多）强度测量中恢复定量相分布。但是，如果确实存在独特的解决方案，这些方法通常需要过度采样和高计算资源，从而限制了在重要应用中使用该方法。另一方面，相位对比方法基于单个摄像头的暴露，但仅提供对阶段的定性描述，因此对于需要定量阶段描述的应用没有用。在这项研究中，我们采用了上述两种方法的联合方法来克服它们各自的缺点。我们表明，通过使用相诱导的强度测量来初始化算法，即使用所检查对象的相对造影剂图像来初始化算法，从而轻松地收敛到正确的解决方案。证明了二进制和连续变化的相对物体的准确定量相测量，以支持建议的系统作为单次定量相对造影剂显微镜。
In the last five decades, iterative phase retrieval methods draw large amount of interest across the research community as a non-interferometric approach to recover quantitative phase distributions from one (or more) intensity measurement. However, in cases where a unique solution does exist, these methods often require oversampling and high computational resources, which limits the use of this approach in important applications. On the other hand, phase contrast methods are based on a single camera exposure but provides only a qualitative description of the phase, thus are not useful for applications in which the quantitative phase description is needed. In this study we adopt a combined approach of the two above-mentioned methods to overcome their respective drawbacks. We show that a modified phase retrieval algorithm easily converges to the correct solution by initializing the algorithm with a phase-induced intensity measurement, namely with a phase contrast image of the examined object. Accurate quantitative phase measurements for both binary and continuously varying phase objects are demonstrated to support the suggested system as a single-shot quantitative phase contrast microscope.
