Canon Kabushiki Kaisha

Kabushiki Kaisha Topcon

Topcon Corporation

Atsushi Kubota

Akiyoshi Kimura

Michiro Koike

Masashi Ohashi

Nobukazu Sasaki

Takashi Ozawa

Yasuyoshi Yamamoto

Yasufumi Fukuma

Tatsuya Shiratori

Toshirou Kasamura

Toshihiko Kusumoto

Yusuke Ono

Taiki Aimi

Kanichi Tokuda

Shinichi Sasaki

Hisashi Tsukada

Shigeo Miyabe

Masahiro Akiba

Hironobu Isobe

Zhenguo Wang

Charles A Reisman

Jonathan Liu

Tadayuki Tsuda

Isao Ikemoto

Yasuyoshi Hayakawa

Kazuyoshi Odagawa

Teruo Komatsu

Naoki Okuda

Yasunori Maeda

Shigetaka Tsuri

Hiroshi Hara

Tadashi Sato

Takashi Saito

Kanji Yokomori

Yoshiya Nomura

Noritaka Mochizuki

Katsuhiko Yamada

Shigeyoshi Onoda

Hiroyuki Ishii

Shinnosuke Taniishi

Hiroo Kobayashi

Masahiko Yashiro

Kazunori Kobayashi

Tomoyuki Araki

Hajime Katayama

Koji Miura

Masashi Suda

Hidetoshi Tanaka

Ken Tanabe

Yusaku Takada

Tomohiro Sakurada

Norio Hikake

Haruo Tsunoi

Masao Yoshikawa

Teruo Morikawa

Tateki Nagaoka

Tomoyoshi Abe

Otoya Kosugiyama

Tatuya Kobayashi

Ryuji Araki

Toshiro Kasamura

Tuyoshi Waragai

Kenji Ohkawara

Makoto Masuda

An OCT apparatus of an exemplary aspect includes an OCT scanner, image data generating unit, registration unit, and image data composing unit. The OCT scanner is configured to acquire three dimensional data sets by applying an OCT scan to mutually different three dimensional regions of a sample. The image data generating unit is configured to generate a plurality of pieces of image data from the three dimensional data sets. The registration unit is configured to perform a first registration between the plurality of pieces of image data by applying an image correlation calculation to each of overlap regions in the plurality of pieces of image data. The image data composing unit is configured to compose the plurality of pieces of image data based on a result of the first registration.

Method of processing optical coherence tomography (OCT) data, method of OCT imaging, and OCT data processing apparatus

Methods and systems for angiographic imaging with optical coherence tomography (OCT) are described using ratio-based and angiographic deviation based calculations. In using these calculations to determine motion, arbitrary interframe permutations may be used, post- calculated, non-linear results for projection visualization may be averaged, poor matches may be eliminated on an A-line by A-line basis, windowing functions may be used to improve results, partial spectrums may be used when capturing data, and a minimum intensity threshold may be used for determining which pixels to use.

OCT angiography calculation with optimized signal processing

An exemplary aspect is a method of processing data acquired by applying an optical coherence tomography (OCT) scan to a sample. The method includes preparing a three dimensional data set acquired from a sample, creating a two dimensional map based on representative intensity values of a plurality of pieces of A-scan data included in the three dimensional data set, placing the three dimensional data set based on the two dimensional map, and executing a process based on at least a partial data set of the three dimensional data set on which placement based on the two dimensional map has been performed.

Method of processing optical coherence tomography (OCT) data and OCT data processing apparatus

An OCT imaging method of some exemplary aspects includes acquiring a first three dimensional data set by applying an OCT scan targeting a first three dimensional region of a sample, creating a first two dimensional map based on representative intensity values respectively of a plurality of pieces of A-scan data included in the first three dimensional data set, designating a second three dimensional region of the sample based on the first two dimensional map, acquiring a second three dimensional data set by applying an OCT scan targeting the second three dimensional region, and generating image data from at least part of the second three dimensional data set.

Method of optical coherence tomography (OCT) imaging, method of processing OCT data, and OCT apparatus

A storage device of an ophthalmologic image display device of an embodiment stores a three dimensional data set acquired by scanning a subject's eye using OCT. An image processor forms, based on the three dimensional data set, a B-mode image, front images, and composite front image obtained from the front images. A display controller displays the B-mode image, front images and composite front image in a predetermined layout. The display controller displays distinguishment color information for distinguishment between the front images by colors and slice area information that indicates a partial region of the B-mode image corresponding to a slice area of the three dimensional data set represented by each front image in a color according to the distinguishment color information, and displays a composite front image based on the front images, each of which is expressed by a color according to the distinguishment color information.

Ophthalmologic image display device and ophthalmologic imaging device

An ophthalmologic imaging apparatus of an embodiment includes a data acquisition device, photographing device, a controller, and an error detector. The data acquisition device acquires data by scanning a subject's eye using optical coherence tomography. The photographing device photographs the subject's eye to obtain a front image. The controller controls the data acquisition device to perform a series of scans along a preset path group. The error detector detects an error based on a series of data acquired by the series of scans and two or more front images that include one or more front images obtained by photographing device corresponding to the series of scans.

Ophthalmologic imaging apparatus

Methods and systems for angiographic imaging with optical coherence tomography (OCT) are described using ratio-based and angiographic deviation based calculations. In using these calculations to determine motion, arbitrary interframe permutations may be used, post-calculated, non-linear results for projection visualization may be averaged, poor matches may be eliminated on an A-line by A-line basis, windowing functions may be used to improve results, partial spectrums may be used when capturing data, and a minimum intensity threshold may be used for determining which pixels to use.

An ophthalmic image processing apparatus of an embodiment includes a storage unit, a first brightness profile generation unit, a second brightness profile generation unit, and a brightness correction unit. The storage unit is configured to store image data acquired through scanning a subject's eye using optical coherence tomography. The first brightness profile generation unit is configured to generate a first brightness profile along a first direction by integrating brightness values of the image data. The second brightness profile generation unit is configured to process the first brightness profile to generate a second brightness profile. The brightness correction unit is configured to perform brightness correction of the image data based on the first brightness profile and the second brightness profile.

Ophthalmic image processing apparatus and ophthalmic imaging apparatus

An ophthalmic image display device having, a display controller that displays a B mode image, a blood vessel enhanced image representing a same cross section as the B mode image, and one or more front images individually formed based on a three dimensional data set acquired by performing optical coherence tomography on a subject's eye in a predetermined layout. Further, the display controller displays a cross section position indicator that indicates a position of a cross section of the B mode image over at least one of the one or more front images. In addition, the display controller synchronously performs changing of a display position of the cross section position indicator and updating of a display of each of the B mode image and the blood vessel enhanced image in accordance with an operation for moving the cross section position indicator performed using an operation unit.

Ophthalmic image display device and ophthalmic imaging device

Distribution information of examination results of eye fundus is displayed. An imaging part carries out movie imaging of fundus. A tomographic image forming part comprises an optical system that generates and detects interference light by superposing signal light from fundus on reference light and a scanner that scans fundus with signal light, and forms tomographic image of fundus based on detection results of interference light acquired by the scanning. A setting part sets scan-target location of signal light on distribution information. A specifying part specifies image region in fundus image obtained by the movie imaging that corresponds to the scan-target location. A controller controls the scanner based on the specified image region to carry out scanning of signal light. The tomographic image forming part forms tomographic image from the detection results of interference light acquired by the scanning of signal light based on the control.

Fundus observation apparatus

A fundus observation apparatus according to an embodiment comprises: a photographing part that photographs the fundus of a subject eye; a forming part comprising an optical system that irradiates signal light onto the fundus and interferes reflected light of the signal light from the fundus with reference light via a reference path and detects the resulting interference light, wherein the forming part forms a tomographic image of the fundus based on the detection result; and an analyzing part that analyzes a photographed image of the fundus from the photographing part to delete predetermined low-frequency components from the photographed image.

An ophthalmologic apparatus of an embodiment includes an examination part, a moving mechanism, an information obtaining part, and a controller. The examination part is configured to include an optical system for optically examining an eye. The moving mechanism is configured to move the optical system. The information obtaining part is configured to obtain information for carrying out position matching of the optical system to the eye. The controller is configured to carry out first control for the moving mechanism based on the information obtained by the information obtaining part to move the optical system, determine whether information optically obtained by the optical system after the first control is appropriate to the examination or not, and when it is determined that this information is not appropriate, carry out second control for the moving mechanism in response to a prescribed trigger to move the optical system.

Ophthalmologic apparatus

Growing community of inventors

Tokyo, Japan

Atsushi Kubota