We build up a common-path optical coherence tomography （OCT） system using reflected light of sample surface as reference light. As the zero path length reference point has nothing to do with the distance between pro...We build up a common-path optical coherence tomography （OCT） system using reflected light of sample surface as reference light. As the zero path length reference point has nothing to do with the distance between probe and organ, it can be utilized in endoscopic system. Besides, an optical delay stair is used in this common-path OCT to reconstruct the exact morphology of tissue surface, diminishing the distortion caused by sample surface reference.展开更多
文摘扫频光学相干层析成像(swept source optical coherence tomography,SSOCT)是一种新型的基于傅里叶变换的医学成像技术.为了抑制SSOCT图像中的直流噪声、寄生项以及由傅里叶变换产生的伪影项,提出单次相位变化方法,设计并搭建了SSOCT成像系统,轴向扫描速度可以达到50 k Hz.利用该系统对3层玻璃片进行成像,干涉信号经过该方法消伪影处理后,玻璃片成像的信噪比提高了18.22 d B,同时成像深度增加为原来的2倍,证明该方法可以提高低浑浊介质的成像质量.
基金This study was supported by the National Science Foundation （No. 61201037） and the Ministry of Education （No. 20120032120069）, China.
文摘We build up a common-path optical coherence tomography （OCT） system using reflected light of sample surface as reference light. As the zero path length reference point has nothing to do with the distance between probe and organ, it can be utilized in endoscopic system. Besides, an optical delay stair is used in this common-path OCT to reconstruct the exact morphology of tissue surface, diminishing the distortion caused by sample surface reference.
