公开(公告)号：US10799116B2

公开(公告)日：2020-10-13

申请号：US15754157

申请日：2016-07-29

Applicant: TOPCON CORPORATION

Inventor： Shunsuke Nakamura ,  Jun Sakai

IPC: A61B3/12 ,  A61B3/10 ,  A61B5/00 ,  A61B5/026 ,  G06T7/73 ,  A61B3/00 ,  A61B3/14 ,  A61B5/0285

Abstract: An embodiment is a blood flow measurement device that generates blood flow information based on data collected by repeatedly scanning an interested cross section intersecting a blood vessel of an eye fundus using OCT. A data collector scans four or more cross sections intersecting the blood vessel. A first calculator determines a first gradient and second gradient of the blood vessel by analyzing a first data group and second data group among four or more pieces of data corresponding to the four or more cross sections collected by the data collector. A second calculator determines a gradient of the blood vessel at the interested cross section based on the first gradient and the second gradient. A blood flow information generator generates the blood flow information based on the gradient determined by the second calculator and the data collected by repeatedly scanning the interested cross section.

公开(公告)号：US11911108B2

公开(公告)日：2024-02-27

申请号：US16966480

申请日：2018-12-26

Applicant: TOPCON CORPORATION

Inventor： Jun Sakai ,  Shunsuke Nakamura ,  Kana Nishikawa ,  Masahiro Akiba

IPC: A61B3/00 ,  A61B3/10 ,  A61B3/12

CPC classification number: A61B3/1233 ,  A61B3/0033 ,  A61B3/102

Abstract: A blood flow measuring unit of a blood flow measurement apparatus of an embodiment includes an optical system for applying an OCT scan to an eye fundus and obtains blood flow information based on data acquired by the OCT scan. A movement mechanism moves the optical system. A controller applies a first movement control to the movement mechanism to move the optical system in a first direction orthogonal to an optical axis of the optical system by a predetermined distance from the optical axis. A judging unit judges occurrence of vignetting based on a detection result of return light of light incident on the eye through the optical system after the first movement control. The controller applies a second movement control to the movement mechanism to further move the optical system based on a judgement result obtained by the judging unit.

公开(公告)号：US11291368B2

公开(公告)日：2022-04-05

申请号：US16297760

申请日：2019-03-11

Applicant: TOPCON CORPORATION

Inventor： Shunsuke Nakamura

IPC: A61B3/15 ,  A61B3/00 ,  A61B3/135

Abstract: An ophthalmologic apparatus includes a data acquisition unit, a movement mechanism, an image acquisition unit, an analyzer, and a controller. The data acquisition unit is configured to optically acquire data of a fundus of a subject's eye. The movement mechanism is configured to change relative position between the subject's eye and the data acquisition unit. The image acquisition unit is configured to acquire an image of the fundus. The analyzer is configured to specify at least one of a relative movement direction and relative movement amount of the data acquisition unit with respect to the subject's eye based on a flare region in the image and a reference position in the image. The controller is configured to control the movement mechanism based on the at least one of the relative movement direction and the relative movement amount.

公开(公告)号：US11202566B2

公开(公告)日：2021-12-21

申请号：US16351554

申请日：2019-03-13

Applicant: TOPCON CORPORATION

Inventor： Shunsuke Nakamura

IPC: A61B3/00 ,  A61B3/15 ,  A61B3/135

Abstract: An ophthalmologic apparatus includes a data acquisition unit, a movement mechanism, an image acquisition unit, an analyzer, and a controller. The data acquisition unit includes an optical system for optically acquiring data of a fundus of a subject's eye. The movement mechanism is configured to change relative position between the subject's eye and the data acquisition unit. The image acquisition unit is configured to acquire an image of the fundus. The analyzer is configured to specify a relative movement direction and relative movement amount of the data acquisition unit with respect to the subject's eye based on a flare region formed all around a fundus region in the image. The controller is configured to control the movement mechanism based on the relative movement direction and the relative movement amount to change relative position between the subject's eye and the data acquisition unit in an optical axis direction of the optical system.