Sun Yat-sen University, School of Electronics and Information Technology, Guangzhou, China.
J Biomed Opt. 2018 Mar;23(3):1-3. doi: 10.1117/1.JBO.23.3.030502.
Saturation artifacts that are commonly observed in endoscopic swept-source optical coherence tomography (SSOCT) images cause image degradation and loss of image information. We present work on the correction of saturation effects in endoscopic SSOCT imaging. This method utilizes a broadband power divider with excellent pick-off flatness to divide the detected interference signal into the two channels of an analog-to-digital converter. Based on the precise calibration of the splitting ratio between the two channels, the maximum measurable signal power of the system was drastically increased by using the low level signal in one channel to correct the saturated signal in the other channel. The experimental results demonstrated that this technique can efficiently correct the saturation artifacts in endoscopic two- and three-dimensional SSOCT images in an accurate and cost-effective manner.
在内窥式扫频源光学相干断层扫描（SSOCT）图像中，常见的饱和伪影会导致图像质量下降和信息丢失。我们介绍了一种用于校正内窥式 SSOCT 成像中饱和效应的方法。该方法利用具有优异分光平坦度的宽带功率分配器，将探测到的干涉信号分为模数转换器的两个通道。基于两个通道分光比的精确校准，通过使用一个通道中的低电平信号来校正另一个通道中的饱和信号，系统的最大可测信号功率大大提高。实验结果表明，该技术可以有效地校正内窥式二维和三维 SSOCT 图像中的饱和伪影，具有准确且经济高效的特点。
