Nidek Co., Ltd.

Norimasa Satake

Yukihiro Higuchi

Yasuhiro Furuuchi

Tetsuya Kano

Yuji Murase

Hisanari Torii

Masaaki Hanebuchi

Naoki Isogai

Naoki Takeno

Mitsuo Yamamoto

Hajime Namiki

Ai Takaya

Ai Yamakawa

Yoshiyuki Yamada

Hisanori Torii

Ryosuke Shiba

Naoto Honda

Toshio Murata

Keiji Murata

Kenshiro Fujiu

Seiji Taki

Yuki Kuno

Hideki Aono

Tetsuya Kanou

Ryoichi Aihara

An OCT device includes an OCT optical system and a controller that also serves as an image processor. The controller acquires the OCT data of the fundus by processing the spectral interference signal output from the OCT optical system. In addition, the controller adjusts the position of the high accuracy region, which is the depth region where relatively high accuracy OCT data is obtained, by controlling the OCT optical system in accordance with the curvature level of the fundus image in the photographing range of the OCT data. This makes it possible to acquire good OCT data regardless of the curvature level of the fundus.

OCT device

The present disclosure relates to an optical coherence tomography (OCT) including: an OCT device, an OCT calculation method, and an OCT calculation program, enabling correlation between images to be easily performed; more specifically it relates to a case where a functional OCT image such as a motion contrast is acquired by using the OCT; acquiring the functional OCT image through a calculation process of an OCT signal is a time-consuming process, for this reason, a long time elapses until the point that a functional OCT image can be observed after OCT imaging is completed, and thus this causes stress to a subject and an examiner; the present disclosure provides an OCT device, an OCT calculation method, and an OCT calculation program, enabling a functional OCT image to be rapidly acquired and enables an examiner to easily perform diagnosis.

Optical coherence tomography device, optical coherence tomography calculation method, and optical coherence tomography calculation program

An ophthalmic analysis apparatus for analyzing OCT motion contrast (MC) image data of a subject's eye acquired using an OCT apparatus for ophthalmology includes analysis process means for analyzing the OCT MC image data, in which the analysis process means generates OCT blood vessel change data including temporal change information in relation to a blood vessel region of the subject's eye based on first OCT MC image data and second OCT MC image data acquired at mutually different times.

Ophthalmic analysis apparatus and ophthalmic analysis method

An OCT motion contrast data acquisition method using an optical coherence tomography device includes: controlling an optical scanner for scanning measurement light on a test subject; performing a first scanning control for obtaining a first OCT signal group including at least four temporally different OCT signals at a same scanning position; performing a second scanning control for obtaining a second OCT signal group including at least four temporally different OCT signals at the same scanning position; obtaining first motion contrast data based on the first OCT signal group obtained in the first scanning control; obtaining second motion contrast data based on the second OCT signal group obtained in the second scanning control; and obtaining third motion contrast data based on the first motion contrast data and the second motion contrast data.

OCT motion contrast acquisition method and optical coherence tomography device

An ophthalmic analysis device for analyzing OCT motion contrast data including blood vessel information of a subject eye acquired by an ophthalmic OCT, includes: a processor; and memory storing computer readable program, when executed by the processor, causing the ophthalmic analysis device to execute: an analysis process of analyzing the OCT motion contrast data to acquire a measurement result related to a capillary area of the subject eye. The analysis process executes an alleviating process for alleviating the influence of great blood vessels having blood vessel diameters larger than those of capillaries on the measurement result to acquire the measurement result related to the capillary area.

Ophthalmic analysis device and ophthalmic analysis program

An ophthalmologic information processing apparatus for performing follow-up of a subject eye based on plural pieces of OCT data obtained at different dates includes: a processor; and memory storing computer readable instructions, when executed by the processor, causing the ophthalmologic information processing apparatus to execute: a first acquisition process of acquiring plural pieces of layer thickness information regarding a fundus, the plural pieces of layer thickness information being a processing result of the plural pieces of OCT data of the subject eye; a matching process of matching the pieces of layer thickness information based on the plural pieces of OCT data to each other in consideration of a difference in acquisition condition among the pieces of OCT data; and a display control process of displaying results of the matching of the pieces of layer thickness information on a monitor.

Ophthalmologic information processing apparatus and ophthalmologic information processing method

A fundus analysis device includes: a first database which stores layer thickness information of fundus relating to a plurality of eyes having respective long ocular axial lengths; a processor; and memory storing non-transitory computer readable instructions, when executed by the processor, causing the fundus analysis device to execute: an acquisition instruction of acquiring a tomographic image of a fundus of an examinee's eye by an optical coherence tomography device; and an analysis processing instruction of acquiring analysis information relating to layer thickness information of the fundus of the examinee's eye by referring to the first database.

Fundus analysis device and fundus analysis program

An optical coherence tomography device includes an OCT optical system that irradiates a tissue of the subject's eye with measurement light from a light source, and detects interference between reference light and the measurement light reflected from the tissue by using a detector, and a processor, in which the processor performs a generation process of acquiring A-scan data based on a signal output from the detector in a cycle of 300 kilohertz or more and generating three-dimensional OCT data at any time based on the acquired A-scan data, and performs an analysis process on each piece of the three-dimensional OCT data generated at any time through the generation process, so as to output a real-time analysis result of the three-dimensional OCT data which is generated at any time.

Optical coherence tomography device

An ophthalmologic photographing apparatus includes: a photographing optical system that includes a scanning unit for scanning an examinee's eye with measurement light to obtain a tomographic image of the examinee's eye; an observing optical system that includes a light-receiving device for receiving reflected light from the examinee's eye to obtain a moving image of a front image of the examinee's eye based on a light-receiving signal from the light-receiving device; a display controller for displaying the front image acquired by the observing optical system in a still state on a monitor as well as enabling setting of a capturing position of the tomographic image, the setting using the front image; and a drive controller for controlling the scanning unit to acquire the tomographic image in accordance with the capturing position.

Ophthalmologic photographing apparatus and ophthalmologic photographing method

An ophthalmic analysis apparatus is the ophthalmic analysis apparatus for obtaining analysis results of tomography images of a subject eye acquired at different dates by ophthalmic optical coherence tomography and outputting statistical information formed based on time-series data of the analysis results, and includes instruction receiving means for receiving selection instructions to select an analytical region on a subject eye from an examiner, and control means for respectively acquiring analysis results in the analytical region selected by the instruction receiving means with respect to tomography images acquired at the different dates and outputting the statistical information.

Ophthalmic analysis apparatus and ophthalmic analysis program

An ophthalmic imaging device that captures an image of a test eye, the device includes: an OCT optical system configured to acquire an OCT signal by scanning a tissue of the test eye with measurement light, the ophthalmic imaging device configured to execute: receiving a designation of a wide area which is wider than a unit area which is an acquisition unit for acquiring motion contrast data indicating a motion of the tissue; acquiring a plurality of OCT signals for the same position at different timing in each of a plurality of unit areas, the plurality of unit areas being positioned in the designated wide area and being not completely overlapped with each other; and acquiring the motion contrast data of each of the plurality of unit areas by processing the plurality of OCT signals acquired for the same position.

Ophthalmic imaging device and ophthalmic imaging program

An optical coherence tomography device includes: an OCT optical system configured to obtain a OCT signal; a front observation optical system configured to obtain a front image of the test substance; and a controller is configured to: control the OCT optical system to obtain first temporally different OCT signals with respect to the test substance; control the front observation optical system to obtain a first front image of the test substance at the time the first OCT signals are obtained; control the front observation optical system to obtain a second front image of the test substance after that; determine whether or not the plurality of first OCT signals are good based on a positional deviation between the first and second front images; and obtain motion contrast data of the test substance when it is determined that the plurality of first OCT signals are good.

Optical coherence tomography device and optical coherence tomography control program

A fundus photography device includes: an OCT optical system configured to detect interference between a measurement light from a fundus of a subject's eye and a reference light from a reference optical path; a fundus photography optical system configured to detect a reflected light from the fundus; a controller configured to generate a tomographic image of the fundus and a first front image of the fundus based on an output signal from the OCT optical system, and generate a second front image of the fundus based on an output signal from the fundus photography optical system. The controller is configured to cause simultaneous display of the first front image and the second front image in different display regions on a monitor.

Fundus photography device

Disclosed is an ophthalmic photography device for capturing an eye including: a first photography optical system that captures a first image of the eye by capturing the eye by performing a first type of photography; a second photography optical system that captures a second image of the eye by capturing the eye by performing a second type of photography; a third photography optical system that captures a front image of the eye by capturing the eye using a third type of photography; and a controller for acquiring a first front image when the first image is acquired, and acquiring a second front image different from the first front image when the second image is acquired; and for detecting the amount of positional deviation between the first and second front images, and correlating the first image to the second image based on the amount of positional deviation.

Ophthalmic photography device, ophthalmic photography method, and ophthalmic photography program

There is provided an ophthalmic analysis apparatus configured to acquire an analysis result of a tomographic image of a subject eye which is acquired by using optical coherence tomography (OCT), and to output the analysis result. The apparatus functions as a display control unit configured to control a display unit to display a two-dimensional image based on an OCT tomographic image; an analysis region setting unit configured to set multiple analysis regions on the two-dimensional image displayed on the display unit by the display control unit; and an output control unit configured to acquire an analysis result in the multiple analysis regions set by the analysis region setting unit and to output the acquired analysis result.

Growing community of inventors

Aichi, Japan

Norimasa Satake