公开(公告)号：US20170112377A1

公开(公告)日：2017-04-27

申请号：US15297523

申请日：2016-10-19

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Norimasa SATAKE ,  Tetsuya KANO ,  Yasuhiro FURUUCHI ,  Yuki KUNO ,  Ai TAKAYA ,  Naoki TAKENO ,  Yukihiro HIGUCHI ,  Hajime NAMIKI

IPC: A61B3/12 ,  A61B3/00 ,  G06T7/00 ,  G06T7/20 ,  G06T11/60 ,  G06T7/11 ,  G06T7/60 ,  G06T7/90 ,  G06T7/579 ,  A61B3/10 ,  G06K9/00

CPC classification number: A61B3/1233 ,  A61B3/0025 ,  A61B3/0058 ,  A61B3/102 ,  A61B3/1241 ,  G06K9/0061 ,  G06T7/0012 ,  G06T7/11 ,  G06T7/20 ,  G06T7/579 ,  G06T7/60 ,  G06T7/90 ,  G06T11/60 ,  G06T2207/30041 ,  G06T2207/30101

Abstract: An ophthalmic analysis device for analyzing OCT motion contrast data including blood vessel information of a subject eye acquired by an ophthalmic OCT, includes: an analysis processing means configured to analyze the OCT motion contrast data to acquire a measurement result related to a capillary area of the subject eye, wherein the analysis processing means 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.

公开(公告)号：US20240221160A1

公开(公告)日：2024-07-04

申请号：US18603365

申请日：2024-03-13

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Sohei MIYAZAKI ,  Yusuke SAKASHITA ,  Yoshiki KUMAGAI ,  Naoki TAKENO

IPC: G06T7/00 ,  A61B3/10 ,  G06T5/50

CPC classification number: G06T7/0012 ,  A61B3/102 ,  G06T5/50 ,  G06T2207/30041

Abstract: In this invention, a control unit in an ophthalmic image processing device acquires an ophthalmic image captured by an ophthalmic image capture device (S11). The control unit, by inputting the ophthalmic image into a mathematical model that has been trained by a machine-learning algorithm, acquires a probability distribution in which the random variables are the coordinates at which a specific site and/or a specific boundary of a tissue is present within a region of the ophthalmic image (S14). On the basis of the acquired probability distribution, the control unit detects the specific boundary and/or the specific site (S16, S24).

公开(公告)号：US20240108215A1

公开(公告)日：2024-04-04

申请号：US18477084

申请日：2023-09-28

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Hirofumi YOGO ,  Yukihiro HIGUCHI

IPC: A61B3/10 ,  A61B3/14 ,  G06T5/00 ,  G06T7/00

CPC classification number: A61B3/102 ,  A61B3/14 ,  G06T5/002 ,  G06T7/0012 ,  G06T2207/30041

Abstract: An OCT device includes a controller configured to: acquire OCT data of a tissue of a subject in a depth direction that is generated by processing interference signal detected by a light receiving element; and perform a correction process to reduce an effect by a noise floor in the OCT data using a plurality of correction amounts each of which is set in accordance with depth at a corresponding data acquisition position. Strength of the noise floor varies depending on the depth of the data acquisition position.

公开(公告)号：US20220284577A1

公开(公告)日：2022-09-08

申请号：US17826884

申请日：2022-05-27

Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY ,  NIDEK CO., LTD.

Inventor： Michiyuki SAITO ,  Kousuke NODA ,  Kanae FUKUTSU ,  Susumu ISHIDA ,  Ryosuke SHIBA ,  Yoshiki KUMAGAI

IPC: G06T7/00 ,  A61B3/14 ,  G16H30/40

Abstract: A processor of a fundus image processing device acquires a fundus image 50 photographed by a fundus image photographing device. The processor acquires blood vessel images 60A and 60B that indicate at least one of an arteriole and a venule in the fundus image 50 by inputting the fundus image 50 into a mathematical model trained by a machine learning algorithm. The processor acquires a blood vessel area that is an area of at least one of the arteriole and the venule in the whole of the blood vessel images 60A and 60B.

公开(公告)号：US20210295508A1

公开(公告)日：2021-09-23

申请号：US17265367

申请日：2019-04-15

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Sohei MIYAZAKI ,  Yusuke SAKASHITA ,  Yoshiki KUMAGAI ,  Naoki TAKENO

IPC: G06T7/00 ,  G06T5/50 ,  A61B3/10

Abstract: In this invention, a control unit in an ophthalmic image processing device acquires an ophthalmic image captured by an ophthalmic image capture device (S11). The control unit, by inputting the ophthalmic image into a mathematical model that has been trained by a machine-learning algorithm, acquires a probability distribution in which the random variables are the coordinates at which a specific site and/or a specific boundary of a tissue is present within a region of the ophthalmic image (S14). On the basis of the acquired probability distribution, the control unit detects the specific boundary and/or the specific site (S16, S24).

公开(公告)号：US20190274541A1

公开(公告)日：2019-09-12

申请号：US16281441

申请日：2019-02-21

Applicant: NIDEK CO., LTD.

Inventor： Yukihiro HIGUCHI ,  Tetsuya KANO ,  Ryosuke SHIBA

IPC: A61B3/10 ,  A61B3/14 ,  A61B5/00

Abstract: An OCT data processing device includes a processor that performs acquiring three-dimensional OCT data. The three-dimensional OCT data is OCT data of a tissue of a subject's eye acquired by an OCT device and is obtained by irradiating measurement light on a two-dimensional measurement region. The two-dimensional measurement region extends in a direction intersecting an optical axis of the measurement light. The processor further preforms setting a line pattern, from among a plurality of types of line pattern, with respect to the two-dimensional measurement region for which the three-dimensional OCT data is obtained, at least one of an arrangement, a number, or a shape of one or more lines being different for the plurality of types of line pattern, and extracting, from the three-dimensional OCT data, a two-dimensional tomographic image of a cross section intersecting each of the one or more lines of the set line pattern.

公开(公告)号：US20220000361A1

公开(公告)日：2022-01-06

申请号：US17366809

申请日：2021-07-02

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Tetsuya KANO ,  Yukihiro HIGUCHI

IPC: A61B3/10 ,  A61B3/00 ,  G06T7/00

Abstract: There are provided an ophthalmologic information analysis apparatus and an ophthalmologic information analysis program capable of efficiently performing follow-up observation of a subject eye. There is provided: a central processing unit configured to:
acquire first analysis data obtained by analyzing an analysis region of the subject eye in first OCT data including the analysis region; acquire second OCT data captured on a day different from that of the first OCT data; perform an analysis comprising: specifying the analysis region corresponding to the first analysis data from the second OCT data; and acquiring second analysis data obtained by analyzing the analysis region in the second OCT data; and control a display to display the first analysis data and the second analysis data in a comparable manner.

公开(公告)号：US20210304427A1

公开(公告)日：2021-09-30

申请号：US17217928

申请日：2021-03-30

Applicant: NIDEK CO., LTD.

Inventor： Yoshiki KUMAGAI ,  Ryosuke SHIBA

IPC: G06T7/37 ,  G06T11/00 ,  G06T7/00

Abstract: A processor of an ophthalmologic image processing device acquires intermediate information from which an influence of a position shift with respect to a first direction at each position in a second direction is excluded, for each of a first ophthalmologic image and a second ophthalmologic image (S4). The processor performs alignment with respect to the second direction between the first ophthalmologic image and the second ophthalmologic image, based on the intermediate information (S5, S6). The processor performs alignment with respect to the first direction between pixels at the same position with respect to the second direction in the first ophthalmologic image and the second ophthalmologic image for which the alignment with respect to the second direction has been performed (S7).

公开(公告)号：US20210290050A1

公开(公告)日：2021-09-23

申请号：US17132190

申请日：2020-12-23

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Yoshiki Kumagai ,  Masayuki Yoshino

IPC: A61B3/00 ,  A61B3/12

Abstract: An ocular fundus image processing apparatus acquires a fundus image of an subject eye which is captured by a fundus capturing apparatus, acquires a correction image including artifact caused by illumination light without including a fundus of the subject eye as a capturing target, executes conversion processing of the correction image a plurality of times while changing processing content to acquire a plurality of conversion images, and acquires a difference image, as high-quality images, in which an influence of the artifact is suppressed to be less than or equal to a criterion, among a plurality of difference images acquired by taking a difference between each of the plurality of conversion images and the fundus image.

公开(公告)号：US20200311925A1

公开(公告)日：2020-10-01

申请号：US16830936

申请日：2020-03-26

Applicant: NIDEK CO., LTD.

Inventor： Ryosuke SHIBA ,  Yoshiki KUMAGAI ,  Naoto HONDA ,  Kenshiro FUJIU ,  Yuji MURASE ,  Shohei ITO

IPC: G06T7/00 ,  G06T5/00 ,  G06T7/246 ,  G06T5/50 ,  A61B3/12 ,  A61B3/00 ,  A61B3/10 ,  A61B3/14

Abstract: An ophthalmological image processing apparatus acquires a plurality of images of a subject eye photographed in a scanning-type imaging optical system, sets any one of the plurality of images as a template, sets corresponding points or corresponding regions between an image of the subject eye and the template at a plurality of positions of each of the image of the subject eye and the template, calculates a movement amount of each of the corresponding points or each of the corresponding regions, and corrects a distortion of the image of the subject eye with respect to the template based on the movement amount of each of the corresponding points or each of the corresponding regions.