Back to results
US 11,141,060 B2Granted
Ophthalmologic apparatus and method of controlling the same
AssigneeTopcon Corporation
InventorsToshihiro Mino, Jonathan Liu
Life of this patent
Estimating the term…
Abstract
An ophthalmologic apparatus of embodiments includes an OCT unit, an acquisition unit, and a specifying unit. The OCT unit is configured to acquire a tomographic image of a subject's eye using optical coherence tomography. The acquisition unit is configured to acquire a front image of the subject's eye. The specifying unit is configured to specify shape of a tissue of the subject's eye based on the tomographic image acquired by the OCT unit and the front image acquired by the acquisition unit.
Claims9
An ophthalmologic apparatus comprising:
- an OCT unit including an OCT scanner and configured to acquire a tomographic image of a subject's eye using optical coherence tomography;
- an acquisition unit including circuitry configured to capture or receive a front image of the subject's eye;
- processing circuitry configured as a specifying unit configured to specify shape of a tissue of the subject's eye based on the tomographic image acquired by the OCT unit and the front image acquired by the acquisition unit;
- the processing circuitry further configured as a registration unit to perform registration between the subject's eye and the OCT unit;
- and
- the processing circuitry further configured as a displacement specifying unit that specifies a displacement between an eyeball optical axis of the subject's eye and a measurement optical axis of the OCT unit based on the front image of the subject's eye acquired by the acquisition unit after registration is performed by the registration unit, wherein
- the specifying unit is further configured to
- specify the shape of the tissue based on the displacement specified by the displacement specifying unit,
- generate an optical system model based on a biometric data of the subject's eye and the displacement specified by the displacement specifying unit,
- correct the tomographic image based on the displacement specified by the displacement specifying unit,
- specify a predetermined layer region in the tomographic image corrected by the correction unit,
- obtain shape data representing a shape of the predetermined layer region,
- perform ray tracing processing on measurement light for performing optical coherence tomography using the generated optical system model, and obtain a coordinate position in a predetermined coordinate system corresponding to a position on a ray of measurement light, and
- correct the tomographic image or the shape data based on the obtained coordinate position by transforming pixel positions of the tomographic image into pixel positions in the predetermined coordinate system.
11 more elements
A method of controlling an ophthalmologic apparatus, the method comprising:
- a tomographic image acquisition step that acquires a tomographic image of a subject's eye using optical coherence tomography;
- a front image acquisition step that acquires a front image of the subject's eye;
- a specifying step that specifies shape of a tissue of the subject's eye based on the tomographic image acquired in the tomographic image acquisition step and the front image acquired in the front image acquisition step;
- a registration step that performs registration between the subject's eye and an OCT optical system for performing optical coherence tomography;
- and
- a displacement specifying step that specifies a displacement between an eyeball optical axis of the subject's eye and a measurement optical axis of the OCT optical system based on the front image of the subject's eye acquired in the front acquisition step after registration in the registration step, wherein
- the specifying step further includes
- specifying the shape of the tissue based on the displacement specified in the displacement specifying step,
- generating an optical system model based on a biometric data of the subject's eye and the displacement specified by the displacement specifying step,
- correcting the tomographic image based on the displacement specified in the displacement specifying step,
- specifying a predetermined layer region in the tomographic image corrected in the correcting,
- obtaining shape data representing a shape of the predetermined layer region based on the shape of the predetermined layer region, and
- performing ray tracing processing using the generated optical system model and to correct the tomographic image or the shape data by transforming pixel positions of the tomographic image into pixel positions in a predetermined coordinate system.
10 more elements
An ophthalmologic apparatus comprising:
- an OCT unit including an OCT scanner and configured to acquire a tomographic image of a subject's eye using optical coherence tomography;
- an acquisition unit including circuitry configured to capture or receive a front image of the subject's eye;
- processing circuitry configured as a specifying unit configured to specify shape of a tissue of the subject's eye based on the tomographic image acquired by the OCT unit and the front image acquired by the acquisition unit;
- the processing circuitry further configured as a registration unit to perform registration between the subject's eye and the OCT unit;
- and
- the processing circuitry further configured as a displacement specifying unit that specifies a displacement between an eyeball optical axis of the subject's eye and a measurement optical axis of the OCT unit based on the front image of the subject's eye acquired by the acquisition unit after registration is performed by the registration unit, wherein
- the specifying unit is further configured to
- specify the shape of the tissue based on the displacement specified by the displacement specifying unit,
- generate an optical system model based on a biometric data of the subject's eye and the displacement specified by the displacement specifying unit,
- specify a predetermined layer region in the tomographic image,
- correct shape data representing a shape of the predetermined layer region based on the displacement specified by the displacement specifying unit,
- perform ray tracing processing based on the displacement specified by the displacement specifying unit on measurement light for performing optical coherence tomography and using the generated optical system model and to correct the tomographic image or the shape data by transforming pixel positions of the tomographic image into pixel positions in a predetermined coordinate system to a position on the ray of measurement light, and
- correct the tomographic image of the shape data based on the obtained coordinate position.
10 more elements
A method of controlling an ophthalmologic apparatus, the method comprising:
- a tomographic image acquisition step that acquires a tomographic image of a subject's eye using optical coherence tomography;
- a front image acquisition step that acquires a front image of the subject's eye;
- a specifying step that specifies shape of a tissue of the subject's eye based on the tomographic image acquired in the tomographic image acquisition step and the front image acquired in the front image acquisition step;
- a registration step that performs registration between the subject's eye and an OCT optical system for performing optical coherence tomography;
- and
- a displacement specifying step that specifies a displacement between an eyeball optical axis of the subject's eye and a measurement optical axis of the OCT optical system based on the front image of the subject's eye acquired in the front acquisition step after registration in the registration step, wherein
- the specifying step further includes
- specifying the shape of the tissue based on the displacement specified in the displacement specifying step,
- generating an optical system model based on a biometric data of the subject's eye and the displacement specified by the displacement specifying step,
- specifying a predetermined layer region in the tomographic image,
- correcting shape data representing a shape of the predetermined layer region based on the displacement specified by the displacement specifying step, and
- performing ray tracing processing using the generated optical system model and to correct the tomographic image or the shape data by transforming pixel positions of the tomographic image into pixel positions in a predetermined coordinate system.
9 more elements
Dependencies are inferred from the claim text.