title: Phase registration based on matching of phase distribution characteristics and its application in FDOCT.
abstract: Phase fluctuations in a two-transverse-dimensional scanning Fourier domain optical coherence tomography (FDOCT) seriously affect in vivo phase related applications. The phase difference between two A-scans sampled at the same scanning position or adjacent scanning position is acquired by matching of the phase distribution characteristics on the surface of two A-scans. Finger and palm scanning experiments are performed and defocused images of finger and palm are recovered based on Fresnel scalar diffraction algorithm by using phase compensated OCT complex signals. To further prove the performance of the proposed method, human eye scanning experiments are also performed and blood flow images of retina are extracted from the phase registration results. The accurate, fast and simple phase compensation method is critical for in vivo phase related applications.
authors.affiliation: School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China. guozhongliu@tsinghua.org.cn
authors.forename: Guozhong
authors.initials: G
authors.lastname: Liu
authors.forename: Zhehai
authors.initials: Z
authors.lastname: Zhou
authors.forename: Ping
authors.initials: P
authors.lastname: Li
mesh_terms: D005385:Fingers / Q000502:physiology; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D044367:Phase Transition; D012039:Regional Blood Flow; D012171:Retinal Vessels / Q000033:anatomy & histology / Q000502:physiology; D041623:Tomography, Optical Coherence / Q000379:methods*