Canon Kabushiki Kaisha

Canon Ophthalmic Technologies Sp. Z O.o

Canon Optopol Technology Sp. Z O.o.

Optopol Technology Sp. Z O.o

Optopol Technology S.a.

Tomasz Bajraszewski

Tomasz Dziubak

Maciej Szkulmowski

Maciej Wojtkowski

Hiroshi Imamura

Hirofumi Yoshida

Marek Rozanski

Anna Szkulmowska

Marek Różański

Hiroki Uchida

Yasuhisa Inao

Riuma Takahashi

Slawomir Orlowski

Pawel Dalasinski

Piotr Targowski

Andrzej Kowalczyk

Grzegorz Slusarczyk

Pawel Wojdas

Jaroslaw Jaronski

Pawel Dalasinki

Marek Rózanski

Sławomir Orłowski

An optical coherence tomography apparatus includes a control unit configured, before a tomographic image to be stored is obtained using the output from the light receiving unit during a period in which the measurement light is scanned in a first scanning pattern for scanning an image capturing region of the subject eye, to control the optical scanning unit so as to repeatedly scan the measurement light in a second scanning pattern for scanning the measurement light over at least part of the image capturing region in a scanning time shorter than a scanning time of the first scanning pattern and to control the driving unit so as to drive the focusing unit using the output from the light receiving unit during a period in which the measurement light is repeatedly scanned in the second scanning pattern.

Optical coherence tomographic apparatus and method for the same

An image processing apparatus includes an acquisition unit that acquires a plurality of pieces of tomographic data indicating tomographic information on substantially the same part of a subject to be inspected, a threshold calculation unit that calculates a threshold from tomographic data associated with a target pixel for which motion contrast data is to be calculated of the plurality of pieces of tomographic data, and a pixel value calculation unit that calculates the pixel value of the target pixel of a motion contrast image based on the threshold and the motion contrast data calculated from the tomographic data associated with the target pixel.

Image processing apparatus, optical coherence tomography apparatus, image processing method, and computer-readable medium

An information processing apparatus includes an acquisition unit configured to acquire a plurality of data sets each of which includes a plurality of pieces of tomographic data that represents a section of a fundus, the plurality of data sets not including the same tomographic data as each other, a first generation unit configured to generate at least one motion contrast image from each of the plurality of data sets acquired by the acquisition unit, without generating a motion contrast image from across the data sets acquired by the acquisition unit, and a second generation unit configured to generate a single motion contrast image representing a cross section at a predetermined position in the fundus, based on the motion contrast image generated from at least one of the plurality of data sets.

Information processing apparatus, information processing method, and storage medium

Provided is an information processing apparatus including: a first acquisition unit configured to acquire a plurality of pieces of tomographic data based on measurement light controlled to scan the same position of a fundus; a second acquisition unit configured to acquire a correction coefficient by performing an arithmetic operation on a first approximate parameter obtained by transforming, in a first dimension, a parameter of the tomographic data to be used for calculating a motion contrast, and a second approximate parameter obtained by transforming the parameter in a second dimension smaller than the first dimension; a correction unit configured to correct a parameter of at least one piece of tomographic data through use of the correction coefficient; and a generation unit configured to generate a motion contrast image through use of the at least one piece of tomographic data corrected by the correction unit.

Information processing apparatus, image generation method, and computer-readable medium, with acquisition of correction coefficient by performing arithmetic operation on first and second parameters

A method and system for compensating for motion artefacts in Optical Coherence Tomography is provided. A B-scan set includes a plurality of B-scan images acquired at least a position corresponding to a target position of a fundus of an eye. The plurality of B-scans within the B-scan set are aligned using a first alignment process and a second alignment process, where the second alignment process is performed on the B-scan images within the B-scan set aligned by the first alignment process. The first alignment process aligns the B-scan images within the B-scan set at a first resolution in at least an axial direction, and the second alignment process aligns the B-scan images within the B-scan set aligned in the first alignment process at a second resolution having a higher resolution than the first resolution in at least the axial direction.

Method and system for motion artefacts removal in optical coherence tomography

The invention relates to a method and apparatus for measuring the spatial and velocity distribution of scattering structures of a sample in semi-transparent matter. The acquired spectral data I(k, t) are transformed in two steps to image data I(z, v). A Doppler shift is imposed on the light to a separate real and mirror images in the v space to suppress the complex ambiguity artifact.

Method and apparatus for imaging of semi-transparent matter

An image capturing apparatus includes a dividing unit configured to divide light from a light source into reference light and measurement light; a first dichroic mirror arranged in a measurement optical path for guiding the measurement light to an object to be examined; a second dichroic mirror arranged in a reference optical path for guiding the reference light to a reference object; and a light receiving unit configured to receive interference light between the measurement light passing through the first dichroic mirror and the reference light passing through the second dichroic mirror.

Image capturing apparatus, image capturing method, and storage medium

The invention relates to a method and an apparatus for collecting structural data with spectral optical coherence tomography from samples having a point of maximum reflectance. This point of maximum reflectance is used for adjusting the scanned path pattern.

Method and apparatus for eye movement tracking in spectral optical coherence tomography (SD-OCT)

The invention relates to an apparatus for generating a scannable optical delay for a beam of light and an apparatus for Fourier domain optical coherence tomography having said apparatus for generating a scannable optical delay in its reference arm (). The light beam is directed to a pivotably driven mirror () from where it is reflected to a fixed mirror (), and from there back retro reflected along the reference arm (). Lens optics () are provided to ensure accurate optical alignment in several pivot positions of the pivotably driven mirror ().

Spectral optical coherence tomography

In an apparatus for imaging of objects by applying optical frequency domain tomography and provided with an adjusting system for setting a relative position of photosensitive elements () and a spectrum image (), the adjusting system is an automatically controlled device causing a relative displacement of at least one photosensitive element () of the detection device () of the spectrum and the spectrum image () between each other. The adjusting system comprises at least one actuator () acting on the dispersion device () and/or the set of optical elements () and/or the detection device () and movement of which causes the relative displacement between each other of at least one photosensitive element () of the detection device () of the spectrum and the spectrum image () of the resultant light beam ().

Growing community of inventors

Glogowo, Poland

Tomasz Bajraszewski