Phase and amplitude correction in polygon tunable laser-based optical coherence tomography

Phase and amplitude correction in polygon tunable laser-based optical coherence tomography
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多边形可调谐激光光学相干断层扫描中的相位和幅度校正

DOI:
10.1117/1.jbo.22.9.096013
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发表时间:
2017-09
影响因子:
3.5
通讯作者:
Pinghe Wang
Pinghe Wang
中科院分区:
医学3区
文献类型:
--
作者:
Jinyu Fan;Pinghe Wang

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抽象的。相位不稳定性是扫频光源光学相干层析成像(OCT)与多边形可调谐激光器的一个严重问题,然而,这些设备有额外的问题。我们发现,多边形可调谐激光器的输出功率和扫描范围也有波动:前者产生的文物,可能会损害识别的样本信息,而后者减少相位校正过程中的干扰信号利用率。我们展示了一种方法,使用校准信号来量化这些问题,提高系统的稳定性和图像质量。所提出的幅度校正和相位校正方法用于消除垂直伪影,并在减小相位误差的同时提高OCT流量和强度图像的分辨率。
Abstract. Phase instability is a serious problem in swept-source optical coherence tomography (OCT) with polygon tunable lasers; however, these devices have additional issues. We found that polygon tunable lasers also have fluctuations in output power and sweep range: the former creates artifacts that may impair the recognition of sample information, and the latter reduces the interference signal utilization during phase correction. We demonstrate a method that uses the calibration signal to quantify these problems and improve system stability and image quality. The proposed amplitude correction and phase correction methods are used to eliminate vertical artifacts and improve the resolution of OCT flow and intensity images while reducing the phase error.
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