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JP-2026075226-A - Simulation system, simulation method, and simulation program

JP2026075226AJP 2026075226 AJP2026075226 AJP 2026075226AJP-2026075226-A

Abstract

[Challenge] To provide a technology that increases the likelihood of selecting a posterior chamber type phakic intraocular lens of an appropriate size for the subject's eye. [Solution] A simulation system comprising: an acquisition unit that acquires a non-insertion image, which is an image of the anterior segment of the eye to be examined in which a posterior chamber type phakic intraocular lens is not inserted, taken by a tomography device; a generation unit that generates an insertion image, which is an image of the anterior segment of the eye to be examined in which the posterior chamber type phakic intraocular lens is inserted, based on the size of the posterior chamber type phakic intraocular lens to be inserted into the eye to be examined and the non-insertion image; an identification unit that identifies the optimal size, which is the optimal size for the posterior chamber type phakic intraocular lens to be inserted into the eye to be examined, based on the insertion image; and an output unit that outputs information regarding the optimal size. [Selection Diagram] Figure 1

Inventors

  • 岡本 圭一郎
  • 東田 理沙

Assignees

  • 株式会社トーメーコーポレーション

Dates

Publication Date
20260508
Application Date
20241022

Claims (9)

  1. An acquisition unit that acquires non-insertioned images, which are images of the anterior segment of the eye under examination in which a posterior chamber type phakic intraocular lens has not been inserted, taken using a tomography device, A generating unit generates an inserted image, which is an image of the anterior segment of the eye into which the posterior chamber type phakic intraocular lens is inserted, based on the size of the posterior chamber type phakic intraocular lens to be inserted into the eye to be examined and the non-inserted image. Based on the inserted image, the identification unit identifies the optimal size, which is the optimal size for the posterior chamber type phakic intraocular lens to be inserted into the eye under examination. An output unit that outputs information regarding the optimal size, A simulation system equipped with the following features.
  2. The output unit outputs the optimal size. The simulation system according to claim 1.
  3. The output unit outputs the distance between the lens and the posterior chamber type phakic intraocular lens when the optimally sized posterior chamber type phakic intraocular lens is inserted into the eye under examination. The simulation system according to claim 1 or claim 2.
  4. The output unit outputs the inserted image when the posterior chamber type phakic intraocular lens of the optimal size is inserted into the eye under examination. The simulation system according to claim 1 or claim 2.
  5. The specified unit identifies the optimal insertion direction, which is the optimal direction for inserting the posterior chamber type phakic intraocular lens of the optimal size into the anterior segment of the eye, based on the inserted image. The output unit outputs information regarding the optimal insertion direction. The simulation system according to claim 1 or claim 2.
  6. The identifying unit determines the optimal size of the posterior chamber type phakic intraocular lens based on the insertion image obtained when the posterior chamber type phakic intraocular lens is inserted in a direction corresponding to the astigmatism axis of the eye being examined. If the optimal size cannot be determined, the unit changes the direction in which the posterior chamber type phakic intraocular lens is inserted to determine the optimal size. The simulation system according to claim 1 or claim 2.
  7. The specified part is, Based on the inserted image, the distance between the lens and the posterior chamber type phakic intraocular lens is determined for each size of the posterior chamber type phakic intraocular lens, and the size of the posterior chamber type phakic intraocular lens is determined as the optimal size when the distance is within a predetermined range. The simulation system according to claim 1 or claim 2.
  8. The acquisition process involves obtaining an image of the anterior segment of the eye under examination, in which a posterior chamber type phakic intraocular lens has not been inserted, using a tomography device, which is an image of the non-inserted image. A generation step of generating an inserted image, which is an image of the anterior segment of the eye into which the posterior chamber type phakic intraocular lens is inserted, based on the size of the posterior chamber type phakic intraocular lens to be inserted into the eye to be examined and the non-inserted image, Based on the inserted image, the process involves identifying the optimal size, which is the optimal size for the posterior chamber type phakic intraocular lens to be inserted into the eye under examination. An output step that outputs information regarding the optimal size, A simulation method that includes this.
  9. Computers, An acquisition unit that acquires non-insertioned images, which are images of the anterior segment of the eye under examination that does not have a posterior chamber type phakic intraocular lens inserted, taken by a tomography device. A generating unit generates an inserted image, which is an image of the anterior segment of the eye into which the posterior chamber type phakic intraocular lens is inserted, based on the size of the posterior chamber type phakic intraocular lens to be inserted into the eye to be examined and the non-inserted image. A specific unit that identifies the optimal size of the posterior chamber type phakic intraocular lens to be inserted into the eye under examination, based on the aforementioned inserted image. An output unit that outputs information regarding the optimal size, A simulation program designed to function as such.

Description

This invention relates to a simulation system, a simulation method, and a simulation program. One known surgical technique for correcting myopia involves inserting a posterior chamber intraocular lens (IPO) into the eye. During the surgery, an IPO of the appropriate size for the eye is selected from several available sizes. The size of the IPO must be determined before the surgery. Conventionally, techniques have been developed to determine the size of posterior chamber intraocular lenses (IOLs) before surgery. For example, Patent Document 1 discloses a technique for acquiring examination data such as ATA (Angle To Angle) and WTW (White To White) from a patient scheduled for surgery, and then determining the appropriate size of the IOL to be used based on examination data from patients who have previously undergone lens implantation surgery and the size of the IOL used. Patent Document 2 discloses a technique for inputting examination data such as ATA and WTW into a learning model to predict the anterior chamber angle and the size of the IOL. Special table number 2022-533285Patent No. 7482286 This figure shows a simulation system according to one embodiment of the present invention.Figures 2A and 2B schematically show an eye into which a posterior chamber type phakic intraocular lens has been inserted, Figures 2C and 2D show the cross-sectional direction, and Figure 2E shows the posterior chamber type phakic intraocular lens.Figure 3A shows an example of a non-inserted image, while Figures 3B and 3C show examples of inserted images.This is a schematic diagram illustrating a machine learning model.This is a flowchart showing the simulation process.This figure shows an example of how the simulation results are displayed.This figure shows an example of how the simulation results are displayed.This is a flowchart showing the process for determining the insertion direction.This figure shows an example of how the simulation results are displayed.This figure shows an example of how the simulation results are displayed. Here, embodiments of the present invention will be described in the following order. (1) Configuration of the simulation system: (2) Simulation process: (3) Insertion direction determination process: (4) Other embodiments: (1) Configuration of the simulation system: Figure 1 shows a simulation system 100 according to one embodiment of the present invention. The simulation system 100 according to this embodiment is connected to an optical coherence tomography (OCT) apparatus 200, a storage medium 300, an input unit 400, and a display unit 500. The optical coherence tomography apparatus 200 is a device that splits light from a light source into a reference light and a measurement light, and performs optical coherence tomography by measuring the interference between the reference light returned by a mirror or the like and the measurement light returned by the eye under examination. In this embodiment, the optical coherence tomography (OCT) apparatus 200 measures the eye of the subject as the object to be measured, generates measurement information 300a, and stores it in the storage medium 300. The OCT apparatus 200 according to this embodiment can acquire measurement information 300a by measuring at least the anterior segment of the eye of the subject. The configuration of the OCT apparatus 200 is not limited, and it may be capable of measuring a wide range of areas, including the retina. The storage medium 300 is a non-volatile storage medium such as an HDD (Hard Disk Drive) or SSD (Solid State Drive). Various types of data can be stored in the storage medium 300, and the simulation system 100 can save data to the storage medium 300 at any time and read data stored in the storage medium 300. In this embodiment, measurement information 300a obtained by measuring the subject eye without a posterior chamber phakic intraocular lens is stored in the storage medium 300. Furthermore, a cross-sectional image of the anterior segment is generated based on the measurement information 300a, and this image, a non-insertioned image 300b of the anterior segment of the subject eye without a posterior chamber phakic intraocular lens, is stored in the storage medium 300 as an optical coherence tomography (OCT) image 200. Furthermore, in this embodiment, an inserted image 300c, which is an image of the anterior segment of the eye in which a posterior chamber type phakic intraocular lens has been inserted, is generated based on the non-inserted image 300b and stored in the storage medium 300. Furthermore, in this embodiment, a machine learning model 300d, trained to generate the inserted image 300c based on the non-inserted image 300b, is stored in the storage medium 300. Furthermore, in this embodiment, regression equation information 300e for calculating the Vault value (described later) from the measured values of the eye in the examination is stored in the storage medium 300. The various types of information stored i