The simulation for accuracy validation of OCT based Non-Harmonic Analysis
A new processing technique called non-harmonic analysis (NHA) is proposed for optical coherence tomography (OCT) imaging. Conventional Fourier-domain OCT employs the discrete Fourier transform (DFT), which depends on the window function and length. Its axial resolution is inversely proportional to the DFT frame length. The DFT frame length is limited by the sweeping range of the source in swept-source OCT and it is limited by the number of CCD pixels in spectral-domain OCT. However, the NHA process does not have such constraints; NHA can resolve high frequencies irrespective of the window function and the frame length of the sampled data. In this study, the NHA process is described and it is apphed to OCT imaging. It is compared with OCT images based on the DFT. To demonstrate the benefits of using NHA for OCT, we perform OCT imaging with NHA of an onion skin. The results reveal that NHA can achieve an image resolution equivalent that of a 100-nm sweep range using a significantly reduced wavelength range. They also reveal the potential of using this technique to achieve high-resolution imaging without using a broadband source. However, the long calculation times required for NHA must be addressed if it is to be used in clinical applications.
Optical coherence tomography (OCT)
Tetsuya Uchida Xu Cao Shigeki Hirobayashi Tadanobu Misawa Toshio Yoshizawa Changho Chong Atsushi Morosawa Takuya Suzuki
Department of Intellectual Information Systems Engineering Faculty of Technology University of Toyam Santec corporation 5823, Nenjozaka, Ohkusa,Komaki, Aichi, 930-8555, Japan
国际会议
上海
英文
530-533
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）