Results 221 to 230 of about 55,652 (271)

Applications Of Coherence And Statistical Optics Part 1

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 1986
William H. Carter, Bahaa E. A. Saleh
exaly   +2 more sources

Multivariate Statistical Modeling of Retinal Optical Coherence Tomography

IEEE Transactions on Medical Imaging, 2020
In this paper a new statistical multivariate model for retinal Optical Coherence Tomography (OCT) B-scans is proposed. Due to the layered structure of OCT images, there is a horizontal dependency between adjacent pixels at specific distances, which led us to propose a more accurate multivariate statistical model to be employed in OCT processing ...
Maryam Samieinasab, Zahra Amini, Hossein Rabbani   +2 more
openaire   +2 more sources

Speckle statistics in optical coherence tomography

Journal of the Optical Society of America A, 2005
The two previously reported calculations of the amplitude distribution of speckles in optical coherence tomography, each based on a different mathematical formulation, yield different results. We show that a modification of an initial assumption in one of the formulations leads to equivalent results.
Karamata B, Hassler K, Laubscher M, Lasser T   +3 more
openaire   +3 more sources

Statistics and reduction of speckle in optical coherence tomography

Optics Letters, 2000
Studies have shown that optical coherence tomography (OCT) is useful in imaging microscopic structures through highly scattering media. Because spatially coherent light is used in OCT, speckle in the reconstructed image is unavoidable, resulting in degradation of the quality of the OCT images and impaired ability to differentiate subsurface structures.
M, Bashkansky, J, Reintjes
openaire   +2 more sources

Statistical Modeling of Retinal Optical Coherence Tomography

IEEE Transactions on Medical Imaging, 2016
In this paper, a new model for retinal Optical Coherence Tomography (OCT) images is proposed. This statistical model is based on introducing a nonlinear Gaussianization transform to convert the probability distribution function (pdf) of each OCT intra-retinal layer to a Gaussian distribution.
Zahra Amini, Hossein Rabbani
openaire   +2 more sources

Statistically enhanced optical coherence tomography

CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005., 2006
In this paper we derive a reconstruction method based on the maximum-likelihood approach. The measured system is represented here by a sequence of thin parallel layers parametrized by their respective thicknesses and indexes of refraction. Assuming ideal sharp response of the OCT setup, the parameters can be easily calculated from measured amplitude ...
J. Rehacek, Z. Hradil, L. Bartuskova
openaire   +1 more source

The study of optical statistical properties and coherence for XFEL

14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 2019
A X-ray free-electron laser (XFEL) facility is based on RF superconducting accelerator at China Academy of Engineering Physics (CAEP) has been planed. The facility will be designed in a radiation range of 0.3-4 angstrom and the electron beam energy will be 12GeV.
Yuhuan Dou, Shuai Liu, Xiaojian Shu, Xiaozhong He, Yiding Li, Linwen Zhang   +5 more
openaire   +1 more source

Optical-coherence tomography of a dense tissue: statistics of attenuation and backscattering

Physics in Medicine and Biology, 1994
This paper addresses fundamental issues that underlie the interpretation of images acquired from turbid tissues by optical-coherence tomography (OCT). The attenuation and backscattering properties of freshly excised rat arteries and their dependence on the focusing and collection optics of the OCT system were measured at two wavelengths in the near ...
J M, Schmitt, A, Knüttel, M, Yadlowsky, M A, Eckhaus   +3 more
openaire   +2 more sources

Even and odd q-coherent states and their optical statistics properties

Journal of Physics A: Mathematical and General, 1993
Summary: We construct explicitly even and odd \(q\)-coherent states \((qCSs)\), which are proved to form a representation of the quantum Heisenberg-Weyl algebra, and study their properties. It is shown that optical statistics properties of the even and odd \(qCSs\) are very different.
Wang, Fabo, Kuang, Leman
openaire   +1 more source

A statistical model of retinal optical coherence tomography image data

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011
Optical coherence tomography (OCT) is an important mode of biomedical imaging for the diagnosis and management of ocular disease. Here we report on the construction of a synthetic retinal OCT image data set that may be used for quantitative analysis of image processing methods.
Prathamesh Kulkarni, Diana Lozano, George Zouridakis, Michael D. Twa   +3 more
openaire   +2 more sources