Imaging indicia for verifying biometric measurements
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ALCON INC
- Filing Date
- 2021-09-17
- Publication Date
- 2026-06-02
Smart Images
Figure CN116194032B_ABST
Abstract
Description
Background Technology Technical Field
[0002] Embodiments of this disclosure generally relate to methods and apparatus for ophthalmic imaging, and more specifically, to methods and apparatus for displaying imaging markers on ophthalmic images to verify biomeasurements provided by a biomeasurement system.
[0003] Description of related fields
[0004] Before performing ophthalmic surgery (such as cataract surgery), the anatomical features and dimensions of a patient's eye can be measured. Certain interrelationships between the structure of the eye and the measured dimensions affect the determination and selection of the correct lens power for patients undergoing ophthalmic surgery. One such measurement and interrelationship among the components of the eye is the axial length of the eye.
[0005] Axial length of the eye is typically measured during optical biometry of a patient. Axial length is the distance between the anterior surface of the cornea and the relative pre-existing physical surface (RPE) in the fovea. However, various macular abnormalities and / or diseases (such as macular holes, age-related macular degeneration, vitreomacular traction syndrome, vitreomacular schisis, epiretinal membranes, etc.) can cause anatomical changes in the eye. These anatomical changes can affect the measurement of axial length using existing systems. For example, when measuring the axial length of an eye with a macular hole, some existing biometry systems may measure the length from the raised tissue around the macular hole rather than from the RPE in the fovea.
[0006] Furthermore, existing biometric systems may fail to accurately detect macular abnormalities in a patient's eye, and may therefore fail to alert clinicians and / or surgeons to these abnormalities. Failure to alert users to macular abnormalities may result in the implantation of an incorrect lens with the wrong focal length, potentially requiring additional surgery to correct the implantation. Summary of the Invention
[0007] This disclosure generally relates to methods and apparatus for displaying imaging markers on ophthalmic images to validate biomeasures.
[0008] In some embodiments, a method generally includes receiving an instruction to initiate a first optical coherence tomography (OCT) scan of the eye. The method further includes initiating the first OCT scan of the eye based on the received instruction. The method also includes generating a first OCT image of the eye based on the first OCT scan. The method further includes detecting the retinal pigment epithelium (RPE) and the fovea in the eye based on the first OCT image. The method also includes displaying a first enhanced OCT image to a user based on this detection, the first enhanced OCT image displaying: a first virtual marker that at least segments a portion of the detected RPE, wherein the first virtual marker is a curve; and a second virtual marker that visually identifies the location of the detected fovea, wherein the second virtual marker is a radial line.
[0009] Various aspects of this disclosure provide apparatus, devices, processors, and computer-readable media for performing the methods described herein. Attached Figure Description
[0010] To gain a more detailed understanding of the features described above, the present disclosure, which has been briefly summarized above, can be described in more detail with reference to embodiments, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate exemplary embodiments only and should not be construed as limiting the scope of the disclosure, and may allow for other equally effective embodiments.
[0011] Figure 1 A block diagram of selected components of an example imaging system according to an illustrative embodiment of the present disclosure is shown.
[0012] Figure 2 A block diagram of selected components of an OCT controller according to an illustrative embodiment of the present disclosure is shown.
[0013] Figure 3A An example OCT image of an eye according to an illustrative embodiment of this disclosure is shown.
[0014] Figure 3B An example enhanced OCT image of an eye according to an illustrative embodiment of this disclosure is shown.
[0015] Figure 4A An example OCT image of the retina of an eye according to an illustrative embodiment of the present disclosure is shown.
[0016] Figure 4B An example enhanced OCT image of the retina of an eye according to an illustrative embodiment of this disclosure is shown.
[0017] Figure 5A flowchart illustrating an example method for displaying imaging markers on ophthalmic images according to an illustrative embodiment of the present disclosure is shown.
[0018] For ease of understanding, the same reference numerals have been used where possible to refer to the same elements common to the figures. It is contemplated that elements and features of one embodiment may be advantageously combined with those of other embodiments without further description. Detailed Implementation
[0019] This disclosure generally relates to methods and apparatus for displaying imaging markers on ophthalmic images to validate biomeasures.
[0020] Axial length measurement is crucial for selecting the correct intraocular lens with the correct lens power for a patient. Macular abnormalities and / or diseases can affect axial length measurements performed by existing systems. For example, a macular hole may cause existing systems to select an incorrect location far from the fovea as the foveal location. Similarly, macular abnormalities can affect the ability of existing systems to measure from the correct depth of the eye. For example, when a macular abnormality (such as a raised macula) is present in the eye, axial length measurements taken from the macular surface of the raised macula by existing systems may result in a shorter axial length measurement. Existing systems fail to provide users (e.g., clinicians, surgeons, etc.) with any visual instructions on how to measure a patient's axial length. This lack of visual instructions prevents the system from providing users with an effective and simple way to verify axial length measurements.
[0021] Accordingly, some embodiments of this disclosure provide various systems and techniques that improve a user's ability to effectively verify the accuracy of axial length measurements and their correct execution by the imaging system. In some embodiments, the technique for improving a user's ability to effectively verify the accuracy of axial length measurements is based on a visual indicator provided on the image displayed to the user.
[0022] Figure 1 A block diagram of selected components of an example imaging system 100 is shown. The imaging system 100 includes an optical coherence tomography (OCT) scanner 102, an OCT controller 104, and a display 106.
[0023] OCT scanner 102 may include several OCT components and / or instruments (not shown separately). The OCT components and / or instruments can be of various types, and OCT scanner 102 may be configured differently based on the type of OCT components and / or instruments. In some embodiments, OCT scanner 102 may be configured as time-domain OCT (TD-OCT). In some embodiments, OCT scanner 102 may be configured as frequency-domain OCT (FD-OCT). In some embodiments, OCT scanner 102 may be configured as swept-source OCT (SS-OCT).
[0024] OCT scanner 102 performs an OCT scan on a patient's eye 110. OCT scanner 102 performs the OCT scan by controlling one or more sample beams (not shown) to be output to the eye 110 and receiving one or more measurement beams (not shown) reflected back from the eye 110. The one or more measurement beams can be reflected back from the eye 110 in response to the interaction of photons from the sample beams with tissue in the eye 110. OCT scanner 102 can be configured to move the sample beams to a specific location in the eye in response to receiving commands and / or location information from OCT controller 104.
[0025] OCT scanner 102 can be configured to scan eye 110 at various depths. For example, OCT scanner 102 can be configured to scan the entire depth of eye 110 to perform a whole-eye scan. Similarly, OCT scanner 102 can be configured to scan any part of eye 110, such as the retina of eye 110. In some embodiments, OCT scanner 102 can scan different depths of eye 110 at different resolutions. For example, OCT scanner 102 can scan the entire depth of eye 110 at a lower resolution and can scan a portion of eye 110, such as the retina of eye 110, at a higher resolution.
[0026] OCT scanner 102 can be configured to generate scan data based on one or more measurement beams reflected from the eye. The scan data can represent a depth profile of the scanned tissue. In some embodiments, the scan data generated by OCT scanner 102 may include two-dimensional (2D) scan data of line scans (B-scans). In some embodiments, the scan data generated by OCT scanner 102 may include three-dimensional (3D) scan data of face scans (C-scans). OCT scanner 102 can be configured to send the generated scan data to OCT controller 104. In some embodiments, OCT scanner 102 can be configured to send the generated scan data in real-time or near real-time. In some embodiments, OCT scanner 102 can be configured to send the generated scan data after OCT scanner 102 has completed the entire scanning operation.
[0027] OCT scanner 102 can be configured to initiate a scan of eye 110 in response to receiving a command and / or instruction from OCT controller 104. OCT controller 104 can be configured to send a scan initiation command to OCT scanner 102 in response to receiving an instruction from a user (e.g., a surgeon, clinician, medical professional, etc.) to initiate a scan of the eye. In some embodiments, the instruction from the user may provide information for scanning related to the depth and / or position of the eye, and OCT controller 104 can be configured to provide the received information related to the depth and / or position of the eye to OCT scanner 102. For example, the instruction received by OCT controller 104 may indicate a whole-eye OCT scan, and OCT controller 104 may send an instruction to OCT scanner 102 instructing a whole-eye OCT scan. Similarly, the instruction received by OCT controller 104 may indicate an OCT scan of the retina of the eye, and OCT controller 104 may send an instruction to OCT scanner 102 instructing an OCT scan of the retina of the eye.
[0028] The OCT controller 104 can be configured to receive instructions to initiate an eye scan via a user interface (e.g., a graphical user interface (GUI)) and / or an input device (not shown). The input device can be communicatively coupled to and / or integrated with the imaging system 100. Examples of input devices include, but are not limited to, a keypad, a keyboard, a touchscreen device configured to receive touch input, etc.
[0029] The OCT controller 104 may be communicatively coupled to the OCT scanner 102 via one or more electrical and / or communication interfaces. In some embodiments, the one or more electrical and / or communication interfaces may be configured to transmit data (e.g., scan data generated by the OCT scanner 102) from the OCT scanner 102 at a high transmission rate, such that the OCT controller 104 may receive data from the OCT scanner 102 in real time or near real time.
[0030] OCT controller 104 can be configured to generate one or more OCT images based on generated scan data received from OCT scanner 102. For example, OCT controller 104 can be configured to generate 2D images or B-scan images based on 2D scan data generated from line scans. Similarly, OCT controller 104 can be configured to generate 3D images or C-scans based on 3D scan data generated from area scans. OCT controller 104 can be configured to perform image generation and / or image processing in real time and / or near real time.
[0031] OCT controller 104 can be configured to detect and / or automatically segment one or more tissue layers of the eye in the generated OCT image using one or more tissue detection and / or automatic segmentation algorithms. Examples of tissue layers of the eye that OCT controller 104 is configured to detect and / or automatically segment include, but are not limited to, the fovea, retinal pigment epithelium (RPE), anterior corneal surface, retina, cornea, iris, pupil, anterior and posterior surfaces plus the location of the lens, etc. OCT controller 104 can be configured to apply one or more tissue detection and / or automatic segmentation algorithms to scan data received from OCT scanner 102 and / or generated OCT image to detect and / or automatically segment one or more tissue layers of the scanned eye.
[0032] Based on the scan data received from the OCT scanner 102 and / or the generated OCT images, the OCT controller 104 can be configured to generate enhanced OCT images by generating and / or displaying one or more virtual markers on one or more OCT images to visually identify one or more detected and / or automatically segmented tissue layers of the eye.
[0033] OCT controller 104 can be configured to generate and / or display one or more virtual markers on OCT images (e.g., generated OCT images) to visually identify one or more detected and / or automatically segmented tissue layers of the eye. For example, OCT controller 104 can be configured to detect and / or automatically segment the fovea of the eye on OCT images, and generate and / or display virtual markers on OCT images to visually identify the location of the fovea and / or at least segment a portion of the fovea. Similarly, OCT controller 104 can be configured to detect and / or automatically segment the RPE of the eye on OCT images, and generate and / or display virtual markers on OCT images to visually identify the location of the RPE and / or at least segment a portion of the RPE.
[0034] OCT controller 104 can be configured to generate and / or display virtual markers of various shapes and / or sizes. For example, OCT controller 104 can be configured to generate and / or display curved virtual markers (such as curves). Similarly, OCT controller 104 can be configured to generate and / or display virtual markers that are straight lines and / or radial lines that converge to and / or pass through a location in the eye (e.g., the location of the detected fovea in the eye). OCT controller 104 can be configured to generate enhanced OCT images by generating and / or displaying virtual markers on OCT images (e.g., OCT images generated by OCT controller 104).
[0035] In some embodiments, based on OCT images and / or scan data, the OCT controller 104 can be configured to detect abnormal macular anatomy (e.g., abnormal macular condition) in the eye 110. In response to the detection of abnormal macular anatomy, the OCT controller 104 can be configured to send an alert to the user advising against the use of a multifocal intraocular optical lens (IOL) with reduced contrast or an extended depth of focus (EDOF) IOL. In some embodiments, the OCT controller 104 can be configured to periodically send the alert until the OCT controller 104 receives confirmation from the user that the alert has been received.
[0036] OCT controller 104 can be configured to display OCT images and / or enhanced OCT images to a user by providing images to display 106 for display to the user. OCT controller 104 can be communicatively coupled and / or electrically connected to display 106. Display 106 can be configured according to one or more display standards and can be any type of display, such as Video Graphics Array (VGA), Extended Graphics Array (XGA), Digital Visual Interface (DVI), High Definition Multimedia Interface (HDMI), etc.
[0037] Figure 2A block diagram illustrating selected components of an implementation of the OCT controller, such as the reference above. Figure 1 The OCT controller 104 is described. (e.g.) Figure 2 As shown, the OCT controller 104 includes a processor 201, a bus 202, a display interface 204, a memory 210, and a communication interface 220.
[0038] Processor 201 can be communicatively coupled to memory 210, display interface 204, and communication interface 220 via bus 202. OCT controller 104 can be configured to interface with various external components of the imaging system (e.g., imaging system 100), such as OCT scanner 102 and display 106, via processor 201 and communication interface 220. In some embodiments, communication interface 220 can be configured to enable OCT controller 104 to connect to a network (not shown). In some embodiments, OCT controller 104 can be connected to one or more displays, such as display 106, via display interface 204.
[0039] Memory 210 may include persistent, volatile, fixed, removable, magnetic, and / or semiconductor media. Memory 210 may be configured to store one or more machine-readable commands, instructions, data, and / or the like. In some embodiments, such as Figure 2 As shown, memory 210 may include one or more instruction sets and / or instruction sequences, such as operating system 212, scan control application 214, etc. Examples of operating system 212 may include, but are not limited to, UNIX or UNIX-like operating systems. The operating system can be a series of operating systems or another suitable operating system. The scan control application 214 can be configured to perform the OCT controller operations described herein, including but not limited to operations related to initiating eye scans, generating OCT images, processing OCT images, generating and / or displaying virtual markers on OCT images, and generating enhanced OCT images.
[0040] Figure 3A Example OCT image 300a shows an eye (e.g., eye 110). Figure 3AAs shown, OCT image 300a is a whole-eye OCT scan. As described above, OCT controller 104 can be configured to generate OCT image 300a based on scan data received from OCT scanner 102. As described above, OCT controller 104 can be configured to detect and / or automatically segment one or more tissue layers of the eye based on the generated OCT image and / or the received scan data. Furthermore, OCT controller 104 can be configured to generate and / or display virtual markers in the enhanced OCT image, which visually indicate one or more of the detected and / or automatically segmented tissue layers.
[0041] Figure 3B An example enhanced OCT image 300b is shown, which is an eye (e.g., eye 110) generated based on OCT image 300a. Figure 3B As shown in the example, the OCT controller 104 detects the anterior and posterior surfaces of the cornea and generates and / or displays virtual markers 301 and 302 that visually identify the anterior and posterior surfaces of the cornea, respectively. Figure 3B In the example, the OCT controller 104 detects the pupil of the eye and generates and / or displays virtual markers 303 that visually identify the location of the pupil and / or at least a portion thereof in the enhanced OCT image 300b. Similarly, the OCT controller 104 detects the lens and / or the posterior portion of the eye's lens and generates and / or displays virtual markers 304 that visually identify the anterior and / or posterior portion of the eye's lens in the enhanced OCT image 300b. The OCT controller 104 may detect and / or automatically segment the fovea and RPE of the eye and generate and / or display virtual markers 305 and 306 that visually identify the locations of the RPE and fovea, respectively, in the enhanced OCT image 300b. Figure 3B As shown, the virtual marker 306 intersects with the middle portion of the detected and / or automatically segmented portion of the central concave.
[0042] As described above, the OCT controller 104 can be configured to generate and / or display virtual markers that may have various shapes and sizes. For example, such as Figure 3BAs shown, virtual markers 301 and 302 are curved, while virtual marker 306 is straight. In some embodiments, virtual marker 306 may be a radial line converging at the location of a detected fovea. In some embodiments, the shape and / or size of the virtual markers may reflect and / or match the shape and / or size of the OCT image displaying the tissue layer. For example, the curvature of virtual marker 301 matches the curvature of the anterior surface of the cornea of the eye, and the curvature of virtual marker 302 matches the curvature of the posterior surface of the cornea of the eye. Similarly, virtual marker 305 may be a curve, and this curve matches the posterior curvature of the eye 110.
[0043] OCT controller 104 can be configured to generate and / or display one or more virtual markers that visually identify portions of the eye to which biometrics are performed by OCT controller 104. For example, as described above, the axial length of the eye is the distance between the fovea and the anterior surface of the eye. Therefore, in some embodiments, OCT controller 104 can be configured to generate and / or display virtual marker 306 in such a way that virtual marker 306 extends at least from the anterior surface of the cornea and passes through the fovea. In some embodiments, OCT controller 104 can be configured to generate and / or display virtual marker 306 in such a way that virtual marker 306 extends from the portion in front of the retina and passes through the fovea.
[0044] As described above, abnormal macular conditions and / or macular diseases can cause anatomical changes in the macula, and some existing OCT imaging systems may fail to detect abnormal macular conditions and / or diseases, resulting in incorrect axial length measurements without providing the user with any mechanism to verify the accuracy of the measurement and / or any alerts regarding the macular condition and / or disease. However, the OCT controller 104 visually indicates to the user the tissue layers detected by the imaging system 100 (e.g., via the OCT controller 104) by generating and / or displaying virtual markers, and allows the user to determine whether the biometry was performed from the correct location and sufficient depth of the eye.
[0045] For example, in Figure 3BIn this process, the OCT controller 104 generates and / or displays virtual markers 305 along the detected and / or automatically segmented RPE of the eye, and generates and / or displays virtual markers 306 intersecting with the virtual markers 305 to visually indicate to the user that the axial length measurement was taken from the correct part of the eye (e.g., the fovea) and not from the incorrect part of the eye (e.g., the macular hole). Therefore, as described herein, the virtual markers generated and / or displayed by the OCT controller 104 on the enhanced OCT image allow the user to effectively confirm that the imaging system 100 has correctly measured the axial length.
[0046] As described above, in some embodiments, the OCT controller 104 can be configured to initiate scans at different depths of the eye and / or at different resolutions to provide the user with additional OCT-enhanced images, which also allow the user to verify the accuracy of biometric measurements (e.g., axial length). For example, in response to Figure 3A Once the OCT scan of image 300a is completed, the OCT controller 104 can initiate a scan of the retina of the eye.
[0047] Figure 4A An example OCT image 400a of the retina of an eye (e.g., eye 110) is shown. An OCT controller 104 can generate the OCT image 400a based on scan data of the retina received from an OCT scanner 102. The OCT controller 104 can be configured to detect and / or automatically segment retinal tissue layers, such as the fovea, RPE, etc., based on the retinal scan data and / or the OCT image 400a of the retina. The OCT controller 104 can be configured to enhance the OCT image (e.g.,...) Figure 4B Example of an enhanced OCT image 400b) generates and / or displays virtual markers to visually identify detected and / or automatically segmented tissue layers of the retina.
[0048] Figure 4BThe enhanced OCT image 400b is an example enhanced OCT image generated based on OCT image 400a. In example enhanced OCT image 400b, OCT controller 104 generates and / or displays virtual markers 401 and 402 to visually identify the detected and / or automatically segmented RPE and fovea of the eye, respectively. Virtual marker 401 may be a curve. The curvature of the curve of virtual marker 401 may match the posterior curvature of the eye 110. Virtual marker 402 may be a radial line that converges to the location of the detected fovea. OCT controller 104 may be configured to generate and / or display one or more virtual markers on a shallower enhanced OCT image that correspond to one or more virtual markers generated and / or displayed on a deeper, previously enhanced OCT image for the same patient. For example, in image 400b, as... Figure 4B As shown, the virtual marker 402 that visually identifies the location of the central depression and / or at least divides a portion of the central depression corresponds to Figure 3B Virtual markers 306 visually identify the location of the central depression and / or at least segment that portion of the central depression in the enhanced OCT image 300b. Similarly, virtual markers 401 visually identify and / or at least segment a portion of the RPE correspond to... Figure 3B The location of the RPE and / or at least the segmentation of that portion of the RPE is visually identified in the enhanced OCT image 300b by virtual markers 305.
[0049] Therefore, by generating and / or displaying corresponding virtual markers on enhanced OCT images at different depths, the OCT controller 104 allows the user to verify the accuracy of biometry and / or the accuracy of the measurement location within the patient's eye in more detail. For example, the OCT controller 104 can generate and / or display radial virtual markers (e.g., virtual markers 306 and 402) through the fovea and curved virtual markers (e.g., virtual markers 306 and 402) at the RPE on OCT scans (e.g., enhanced OCT images 300b and 400b). The OCT controller 104 can also generate and / or display radial virtual markers through the fovea and / or dividing a portion of the RPE at locations where they intersect perpendicularly with the curved virtual markers at the RPE.
[0050] Figure 5 A flowchart illustrating an example method for displaying imaging markers on an ophthalmic image according to an illustrative embodiment of the present disclosure is shown. Operation 500 may be performed, for example, by an OCT controller (e.g., OCT controller 104 of imaging system 100). Operation 500 may be implemented as a software component that executes and runs on one or more processors (e.g., processor 201).
[0051] Operation 500 can begin at 502, where the OCT controller 104 receives an instruction to initiate a first optical OCT scan of the eye. At 504, the OCT controller 104 initiates the first OCT scan of the eye (e.g., a whole-eye scan, a retinal scan, etc.) based on the received instruction. At 506, the OCT controller 104 generates a first OCT image of the eye (e.g., OCT image 300a, OCT image 400a) based on the first OCT scan (e.g., based on scan data). At 508, the OCT controller 104 detects the retinal pigment epithelium (RPE) and the fovea of the eye based on the first OCT image. At 510, the OCT controller 104 displays a first enhanced OCT image to the user based on this detection, wherein the first enhanced OCT image (e.g., enhanced OCT image 300b, enhanced OCT image 400b) displays: a first virtual marker (e.g., virtual marker 305, virtual marker 401) that shows a portion of the detected RPE segmentation, wherein the first virtual marker is a curve; and a second virtual marker (e.g., virtual marker 306, virtual marker 402) that visually identifies the location of the detected fovea, and wherein the second virtual marker is a radial line passing through the location of the detected fovea.
[0052] In some implementations, the OCT controller 104 detects abnormal macular anatomy (e.g., abnormal macular condition) in the eye based on the first OCT image, and in response to the detection of abnormal macular anatomy, the OCT controller 104 sends an alert to the user suggesting that multifocal IOLs (e.g., multifocal or EDOF IOLs with reduced contrast) should not be used.
[0053] In some embodiments, the OCT controller 104 initiates a second OCT scan of the eye in response to the completion of the first OCT scan. In some embodiments, the OCT controller 104 generates a second OCT image of the eye based on the second OCT scan. In some embodiments, the OCT controller 104 detects the localized recurrent epithelial fovea (RPE) and the fovea of the eye based on the second OCT image. In some embodiments, the OCT controller 104 displays, based on this detection, on the second enhanced OCT image: a third virtual marker (e.g., virtual marker 305, virtual marker 401) that at least segments the portion of the detected RPE that is identical to the first virtual marker; and a fourth virtual marker (e.g., virtual marker 306, virtual marker 402) that at least spans the portion of the detected fovea that is identical to the first virtual marker. In some embodiments, the OCT controller 104 displays the second enhanced OCT image to a user (e.g., via display 106).
[0054] In some embodiments, the OCT controller 104 sends an alert to the user, which requires the user to confirm whether the fovea is accurately detected in at least one of the first enhanced OCT image or the second enhanced OCT image. In some embodiments, the second OCT scan of the eye is a retinal scan of the eye, and the second OCT image of the eye is a retinal image of the eye (e.g., image 400a).
[0055] In some embodiments, the third virtual marker (e.g., virtual marker 305, virtual marker 401) is a curve, and the curvature of the curve matches the posterior curvature of the eye. In some embodiments, the first virtual marker (e.g., virtual marker 305, virtual marker 401) and the second virtual marker (e.g., virtual marker 306, virtual marker 402) intersect perpendicularly. In some embodiments, the fourth virtual marker is a straight line (e.g., a radial line passing through the detected location of the fovea).
[0056] In some embodiments, a second virtual marker (e.g., virtual marker 306) extends across the anterior portion of the retina of the eye on the first enhanced OCT image (e.g., image 300b). In some embodiments, the first OCT image (e.g., image 300a) is an OCT B scan image and a complete biometric measurement of the eye.
[0057] The methods and apparatus described above provide novel systems and methods for displaying virtual imaging markers, which can be used to improve the accuracy and verification of biometrics of a patient's eye. For example, the described systems and methods improve a user's ability to efficiently and accurately verify whether axial length measurements are correctly determined by the imaging system.
[0058] While the foregoing has been directed to embodiments of this disclosure, other and further embodiments of this disclosure may be devised without departing from its essential scope, the scope of which is defined by the following claims.
[0059] Example 1: An imaging system comprising: a memory including computer-executable instructions; a processor configured to execute the computer-executable instructions and cause the imaging system to: receive an instruction to initiate a first optical coherence tomography (OCT) scan of an eye; initiate the first OCT scan of the eye based on the received instruction; generate a first OCT image of the eye based on the first OCT scan; detect the retinal pigment epithelium (RPE) of the eye and the fovea of the eye based on the first OCT image; and display a first enhanced OCT image to a user based on such detection, the first enhanced OCT image displaying: a first virtual marker that at least segments a portion of the detected RPE, wherein the first virtual marker is a curve; and a second virtual... The method comprises: marking a second virtual marker, wherein the second virtual marker visually identifies the location of the detected fovea, and wherein the second virtual marker is a radial line passing through the location of the detected fovea; initiating a second OCT scan of the eye in response to the completion of the first OCT scan; generating a second OCT image of the eye based on the second OCT scan; detecting the RPE of the eye and the fovea in the eye based on the second OCT image; displaying, based on such detection, on a second enhanced OCT image: a third virtual marker, which at least segments the portion of the detected RPE that is identical to the first virtual marker; and a fourth virtual marker, which at least spans the portion of the detected fovea that is identical to the first virtual marker; and displaying the second enhanced OCT image to the user.
[0060] The imaging system as described in Example 1, wherein the second OCT scan of the eye is a retinal scan of the eye, and wherein the second OCT image of the eye is a retinal image of the eye.
[0061] The imaging system as described in Example 1, wherein the third virtual marker is a curve, and wherein the curvature of the curve matches the posterior curvature of the eye.
[0062] The imaging system as described in Example 1, wherein the first virtual marker and the second virtual marker intersect perpendicularly.
[0063] The imaging system as described in Example 1, wherein the second virtual marker extends across the front of the retina of the eye on the first enhanced OCT image.
[0064] The imaging system as described in Example 1, wherein the first OCT image is an OCT B scan image and a complete biometric measurement of the eye.
Claims
1. A method for ophthalmic imaging, characterized in that, The method includes: Receive instructions to initiate the first optical coherence tomography scan of the eye; The first optical coherence tomography scan of the eye is initiated based on the received instructions; A first optical coherence tomography image of the eye is generated based on the first optical coherence tomography scan; The retinal pigment epithelium of the eye and the fovea of the eye are detected based on the first optical coherence tomography image; and Based on the detection, a first enhanced optical coherence tomography (EOP) image is displayed to the user, and the first EOP image is displayed as follows: A first virtual marker, which overlaps with the first optical coherence tomography image and at least segments a portion of the detected retinal pigment epithelium, wherein the first virtual marker is a curve, and A second virtual marker, which overlaps with the first optical coherence tomography image, wherein the second virtual marker visually identifies the location of the detected central fovea, and wherein the second virtual marker is a radial line passing through the location of the detected central fovea and intersects with the first virtual marker.
2. The method of claim 1, further comprising: Detecting abnormal macular anatomy in the eye based on the first optical coherence tomography image; as well as In response to the detection of the abnormal macular anatomy, an alert is sent to the user advising against the use of a multifocal intraocular lens with reduced contrast.
3. The method of claim 1, further comprising: A second optical coherence tomography (OCT) scan of the eye is initiated in response to the completion of the first OCT scan; A second optical coherence tomography image of the eye is generated based on the second optical coherence tomography scan; The retinal pigment epithelium and fovea of the eye are detected based on the second optical coherence tomography image; Displayed on a second enhanced optical coherence tomography image based on the aforementioned detection: A third virtual marker, wherein the third virtual marker at least segments the detected portion of the retinal pigment epithelium that is identical to the first virtual marker, and A fourth virtual marker, which at least spans the same portion as the first virtual marker at the location of the detected central recess; The second enhanced optical coherence tomography image is displayed to the user.
4. The method of claim 3, further comprising: An alert is sent to the user, wherein the alert requires the user to confirm whether the central fovea is accurately detected in at least one of the first enhanced optical coherence tomography image or the second enhanced optical coherence tomography image.
5. The method of claim 3, wherein, The second optical coherence tomography (OCT) scan of the eye is a retinal scan of the eye, and wherein the second OCT image of the eye is a retinal image of the eye.
6. The method of claim 3, wherein, The third virtual marker is a curve, wherein the curvature of the curve matches the posterior curvature of the eye.
7. The method of claim 1, wherein, The first virtual marker and the second virtual marker intersect perpendicularly.
8. The method of claim 1, wherein, The second virtual marker extends across the anterior portion of the retina of the eye on the first enhanced optical coherence tomography image.
9. The method of claim 1, wherein, The first optical coherence tomography image is an optical coherence tomography B-scan image and a complete biometrics of the eye.
10. An imaging system, characterized in that, The system includes: The memory includes computer-executable instructions; A processor configured to execute computer-executable instructions and enable the imaging system to: Receive instructions to initiate the first optical coherence tomography scan of the eye; The first optical coherence tomography scan of the eye is initiated based on the received instructions; A first optical coherence tomography image of the eye is generated based on the first optical coherence tomography scan; The retinal pigment epithelium of the eye and the fovea of the eye are detected based on the first optical coherence tomography image; and Based on the detection, a first enhanced optical coherence tomography (EOP) image is displayed to the user, and the first EOP image is displayed as follows: A first virtual marker, which overlaps with the first optical coherence tomography image and at least segments a portion of the detected retinal pigment epithelium, wherein the first virtual marker is a curve, and A second virtual marker, which overlaps with the first optical coherence tomography image, wherein the second virtual marker visually identifies the location of the detected central fovea, and wherein the second virtual marker is a radial line and intersects with the first virtual marker.
11. The imaging system of claim 10, wherein, The processor is further configured to enable the imaging system to: Detecting abnormal anatomical structures in the eye based on the first optical coherence tomography image; as well as In response to the detection of the abnormal anatomical structure, an alert is sent to the user advising against the use of a multifocal intraocular lens with reduced contrast.
12. The imaging system of claim 10, wherein, The processor is further configured to enable the imaging system to: A second optical coherence tomography (OCT) scan of the eye is initiated in response to the completion of the first OCT scan; A second optical coherence tomography image of the eye is generated based on the second optical coherence tomography scan; The retinal pigment epithelium and fovea of the eye are detected based on the second optical coherence tomography image; Displayed on a second enhanced optical coherence tomography image based on the aforementioned detection: A third virtual marker, wherein the third virtual marker at least segments the detected portion of the retinal pigment epithelium that is identical to the first virtual marker, and A fourth virtual marker, which at least spans the same portion as the first virtual marker at the location of the detected central recess; as well as The second enhanced optical coherence tomography image is displayed to the user.
13. The imaging system of claim 12, wherein, The processor is further configured to enable the imaging system to: An alert is sent to the user, wherein the alert requires the user to confirm whether the central fovea is accurately detected in at least one of the first enhanced optical coherence tomography image or the second enhanced optical coherence tomography image.
14. The imaging system of claim 12, wherein, The second optical coherence tomography (OCT) scan of the eye is a retinal scan of the eye, and wherein the second OCT image of the eye is a retinal image of the eye.
15. The imaging system of claim 12, wherein, The third virtual marker is a curve, wherein the curvature of the curve matches the posterior curvature of the eye.