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1. WO2006102058 - APPARATUS AND METHOD FOR FREQUENCY-DOMAIN OPTICAL COHERENCE TOMOGRAPHY

Publication Number WO/2006/102058
Publication Date 28.09.2006
International Application No. PCT/US2006/009677
International Filing Date 17.03.2006
IPC
G01B 9/02 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers
A61B 5/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
CPC
A61B 5/0066
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
0059using light, e.g. diagnosis by transillumination, diascopy, fluorescence
0062Arrangements for scanning
0066Optical coherence imaging
A61B 5/0073
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
0059using light, e.g. diagnosis by transillumination, diascopy, fluorescence
0073by tomography, i.e. reconstruction of 3D images from 2D projections
A61B 5/7257
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
72Signal processing specially adapted for physiological signals or for diagnostic purposes
7235Details of waveform analysis
7253characterised by using transforms
7257using Fourier transforms
G01B 9/02044
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02041characterised by particular imaging or detection techniques
02044Imaging in the frequency domain, e.g. by using a spectrometer
G01B 9/02083
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02083characterised by particular signal processing and presentation
G01B 9/02091
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02091Tomographic low coherence interferometers, e.g. optical coherence tomography
Applicants
  • THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY [US]/[US] (AllExceptUS)
  • OZCAN, Aydogan [TR]/[US] (UsOnly)
  • DIGONNET, Michel J.F. [FR]/[US] (UsOnly)
  • KINO, Gordon S. [US]/[US] (UsOnly)
Inventors
  • OZCAN, Aydogan
  • DIGONNET, Michel J.F.
  • KINO, Gordon S.
Agents
  • ALTMAN, Daniel E.
Priority Data
60/662,65217.03.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) APPARATUS AND METHOD FOR FREQUENCY-DOMAIN OPTICAL COHERENCE TOMOGRAPHY
(FR) APPAREIL ET PROCEDE DE TOMOGRAPHIE A COHERENCE OPTIQUE
Abstract
(EN)
A method determines the complex scattering function of a portion of a sample under analysis. The method includes providing a magnitude spectrum of a complex spatial Fourier transform of a complex intermediate function. The complex intermediate function is dependent on the complex scattering function of the portion of the sample under analysis. The magnitude spectrum is obtained from power spectrum data of frequency-domain optical coherence tomography of the portion of the sample under analysis. The method further includes providing an estimated phase term of the complex spatial Fourier transform. The method further includes multiplying the magnitude spectrum and the estimated phase term together to generate an estimated complex spatial Fourier transform. The method further includes calculating an inverse Fourier transform of the estimated complex spatial Fourier transform. The inverse Fourier transform of the estimated complex spatial Fourier transform is a spatial function. The method further includes calculating an estimated intermediate function by applying at least one constraint to the inverse Fourier transform of the estimated complex spatial Fourier transform.
(FR)
L'invention concerne un procédé déterminant la fonction de diffusion complexe d'une partie d'un échantillon sous analyse. Le procédé consiste à fournir un spectre de puissance d'une transformation de Fourier spatiale complexe d'une fonction intermédiaire complexe. La fonction intermédiaire complexe est dépendante de la fonction de diffusion complexe de la partie d'échantillon sous analyse. Le spectre de tension est obtenue à partir de données de spectre de puissance de la tomographie de cohérence optique à domaine de fréquence de la partie d'échantillon sous analyse. Le procédé consiste en outre à fournir une fin de phase estimée de la transformation de Fourier spatiale complexe. Le procédé consiste en outre à multiplier le spectre d'amplitude et la fin de phase estimée entre eux afin de générer une transformation de Fourier spatiale complexe estimée. Le procédé consiste également à calculer une transformation de Fourier inverse de la transformation de Fourier spatiale complexe estimée. Cette transformation de Fourier inverse est une fonction spatiale. Le procédé consiste enfin à calculer une fonction intermédiaire estimée par application d'au moins une contrainte à la transformation de Fourier inverse de la transformation de Fourier spatiale complexe estimée.
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