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1. WO2017182816 - COMPENSATING OPTICAL COHERENCE TOMOGRAPHY SCANS

Publication Number WO/2017/182816
Publication Date 26.10.2017
International Application No. PCT/GB2017/051108
International Filing Date 20.04.2017
IPC
G06T 5/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
CPC
A61B 2576/02
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2576Medical imaging apparatus involving image processing or analysis
02specially adapted for a particular organ or body part
A61B 5/0033
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
0033Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
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 6/52
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
52Devices using data or image processing specially adapted for radiation diagnosis
G06T 2207/10072
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2207Indexing scheme for image analysis or image enhancement
10Image acquisition modality
10072Tomographic images
G06T 2207/10101
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2207Indexing scheme for image analysis or image enhancement
10Image acquisition modality
10072Tomographic images
10101Optical tomography; Optical coherence tomography [OCT]
Applicants
  • MICHELSON DIAGNOSTICS LTD [GB]/[GB]
Inventors
  • HOLMES, Jonathan Denis
Agents
  • BARKER BRETTELL LLP
Priority Data
1606897.520.04.2016GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COMPENSATING OPTICAL COHERENCE TOMOGRAPHY SCANS
(FR) COMPENSATEUR DE BALAYAGES DE TOMOGRAPHIE PAR COHÉRENCE OPTIQUE
Abstract
(EN)
A method of processing optical coherence tomography (OCT) scans, comprising: receiving OCT data comprising an OCT signal indicative of the level of scattering in a sample, the OCT data including the OCT signal for at least one scan through the sample, with the OCT signal having been measured at varying depth and position through the sample in each scan; processing the OCT data for each scan with depth to produce a indicative depth scan representative of the OCT signal at each depth through all of the scans; fitting a curve to the indicative depth scan, the curve comprising a first term which exponentially decays with respect to the depth and a second term which depends on the noise in the OCT signal; and calculating a compensated intensity for the OCT signal at each point through each scan, the compensated intensity comprising a ratio of a term comprising a logarithm of the OCT signal to a term comprising the logarithm of the fitted curve.
(FR)
La présente invention concerne un procédé de traitement des balayages de tomographie par cohérence optique (OCT), consistant : à recevoir des données OCT comprenant un signal OCT révélateur du niveau de diffusion dans l'échantillon, les données OCT comportant le signal OCT pour au moins un balayage à travers l'échantillon, avec le signal OCT ayant été mesuré à une profondeur et une position variant à travers l'échantillon dans chaque balayage ; à traiter les données OCT pour chaque balayage avec une profondeur afin de produire un balayage de profondeur indicatif représentatif du signal OCT au niveau de chaque profondeur à travers tous les balayages ; à adapter une courbe au balayage de profondeur indicatif, la courbe comprenant un premier terme qui décroît de façon exponentielle relativement à la profondeur et un second terme qui dépend du bruit dans le signal OCT ; et à calculer une intensité compensée pour le signal OCT au niveau de chaque point à travers chaque balayage, l'intensité compensée comprenant un rapport d'un terme comprenant un logarithme du signal OCT à un terme comprenant le logarithme de la courbe adaptée.
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