TY - JOUR
T1 - Correction of image distortions in endoscopic optical coherence tomography based on two-axis scanning MEMS mirrors
AU - Wang, Donglin
AU - Liang, Peng
AU - Samuelson, Sean
AU - Jia, Hongzhi
AU - Ma, Junshan
AU - Xie, Huikai
PY - 2013
Y1 - 2013
N2 - A two-axis scanning microelectromechanical (MEMS) mirror enables an optical coherence tomography (OCT) system to perform threedimensional endoscopic imaging due to its fast scan speed and small size. However, the radial scan from the MEMS mirror causes various distortions in OCT images, namely spherical, fan-shaped and keystone distortions. In this paper, a new method is proposed to correct all of three distortions presented in OCT systems based on two-axis MEMS scanning mirrors. The spherical distortion is corrected first by directly manipulating the original spectral interferograms in the phase domain, followed by Fourier transform and three-dimensional geometrical transformation for correcting the other two types of distortions. OCT imaging experiments on a paper with square ink printed arrays and a glass tube filled with milk have been used to validate the proposed method. Distortions in OCT images of flat or curved surfaces can all be effectively removed.
AB - A two-axis scanning microelectromechanical (MEMS) mirror enables an optical coherence tomography (OCT) system to perform threedimensional endoscopic imaging due to its fast scan speed and small size. However, the radial scan from the MEMS mirror causes various distortions in OCT images, namely spherical, fan-shaped and keystone distortions. In this paper, a new method is proposed to correct all of three distortions presented in OCT systems based on two-axis MEMS scanning mirrors. The spherical distortion is corrected first by directly manipulating the original spectral interferograms in the phase domain, followed by Fourier transform and three-dimensional geometrical transformation for correcting the other two types of distortions. OCT imaging experiments on a paper with square ink printed arrays and a glass tube filled with milk have been used to validate the proposed method. Distortions in OCT images of flat or curved surfaces can all be effectively removed.
UR - http://www.scopus.com/inward/record.url?scp=84884927953&partnerID=8YFLogxK
U2 - 10.1364/BOE.4.002066
DO - 10.1364/BOE.4.002066
M3 - Article
AN - SCOPUS:84884927953
SN - 2156-7085
VL - 4
SP - 2066
EP - 2077
JO - Biomedical Optics Express
JF - Biomedical Optics Express
IS - 10
ER -