在超声调制光学层析成像中通过离轴外差全息术选择标记光子。

Selection of the tagged photons by off axis heterodyne holography in ultrasound-modulated optical tomography.

作者信息

Gross M

出版信息

Appl Opt. 2017 Mar 1;56(7):1846-1854. doi: 10.1364/AO.56.001846.

DOI:10.1364/AO.56.001846

Abstract

Ultrasound-modulated optical tomography (UOT) is a technique that images optical contrast deep inside scattering media. Heterodyne holography is a promising tool that is able to detect UOT-tagged photons with high efficiency. In this work, we describe theoretically the detection of the tagged photon in heterodyne holography-based UOT, show how to filter the untagged photon, and discuss the effect of shot noise. The discussion also considers speckle decorrelation. We show that optimal detection sensitivity can be reached, if the frame exposure time of the camera used to perform the holographic detection is on the order of the decorrelation time.

摘要

超声调制光学断层扫描（UOT）是一种对散射介质内部深处的光学对比度进行成像的技术。外差全息术是一种很有前景的工具，能够高效地检测经UOT标记的光子。在这项工作中，我们从理论上描述了基于外差全息术的UOT中标记光子的检测，展示了如何过滤未标记光子，并讨论了散粒噪声的影响。该讨论还考虑了散斑去相关。我们表明，如果用于进行全息检测的相机的帧曝光时间与去相关时间处于同一量级，则可以实现最佳检测灵敏度。