16 results about "Fundus photography" patented technology

The invention relates to a diabetic retinopathy fundus photography grading report system combined with a clinical guide, based on an artificial intelligence deep learning technology, and belongs to the field of fundus lesion analysis. The system accurately identifies and segments various lesions such as microhemangioma, bleeding, exudation and the like and symbolic structures such as optic discs, macular regions and the like by automatically analyzing fundus photographic images. The system adopts ICDR international standards to grade diabetic retinopathy, and provides diagnosis and treatment suggestions for lesion characteristics in combination with clinical guidelines of American ophthalmology institute in 2019. Through big data training, the system can generate detailed reports in real time, the early screening rate is remarkably improved, misdiagnosis and missed diagnosis are reduced, and the diagnosis speed and accuracy are improved. The system comprises a plurality of modules, such as an image pre-classification module, a deep learning focus recognition module, an ICDR grading module and a report generation module, efficient and accurate diabetic retinopathy diagnosis and grading are cooperatively achieved, and the clinical management level is improved.

The invention provides eye adjusting equipment integrating eyelid opening, fundus photography and a data port, and belongs to the technical field of intelligent medical wearable equipment. The equipment comprises a glasses frame main body, a non-invasive eyelid opening mechanism, a high-resolution fundus photographing module, diopter-adjustable lenses, a data processing unit and a wired and wireless data port. The eyelid opening mechanism adopts a medical silica gel flexible opening sheet and a push rod, so that safe and automatic eyelid separation is realized; the fundus photographing module supports clear imaging at a field angle of 30-50 degrees based on infrared illumination and a CMOS sensor, and has pupil tracking and automatic focusing functions; the built-in electric control zoom lens can dynamically adjust the diopter from 6.0 D to + 4.0 D. The problems that existing fundus examination equipment is large in size, complex to operate, serious in eyelid shielding, unable to use and the like are solved, and the fundus examination equipment has remarkable clinical application value and industrialization prospects.

According to the line scanning ultra-wide-angle fundus imaging system and method, the super-lens is adopted to replace an eye objective lens in traditional fundus photographing, fundus ultra-wide-angle imaging is achieved, the super-lens can form an ultra-wide-angle middle image plane of fundus retina by adopting a single lens, the structure is compact and small, the size is very light, and the imaging effect is good. The size and the weight of the ultra-wide-angle fundus imaging system are greatly reduced; as the super lens only has two reflecting surfaces which may cause stray light, and the traditional eye objective lens adopts a plurality of lenses, and each lens has two reflecting surfaces which may cause stray light, the stray light during system imaging is reduced by adopting the super lens, and the system complexity and difficulty caused by stray light suppression are also greatly reduced.

The utility model relates to the technical field of training teaching aids, in particular to a sclera jacking and pressing training teaching aid, which comprises a head model, a main control board, a silica gel eyeball model, a Bluetooth module, a voice module and a USB (universal serial bus) charging port, and is provided with a structure of a head, eye sockets, eyelids, conjunctival sacs and eyeballs, so that the model is closer to a real human eye structure; according to the simulation operation teaching aid, the jacking effect can be sensed in real time, a prompt tone can be given out, final evaluation can be made, a wide-area fundus photograph of a real case can be mapped into a retina 3D printing model, a vivid crack-derived retina shedding simulation operation teaching aid is achieved, meanwhile, a virtual eyeball is simulated at a mobile phone or a computer end, the jacking position, range and force are synchronously reflected, and the simulation operation teaching aid can be used for simulating the retina. The sclera jacking and pressing teaching aid is a multimedia physical teaching aid which combines visual virtual guidance and force and position perception, enables an operator to feel more vivid operation and more real feeling, obtains intelligent guidance of a computer, and quickly masters the sclera jacking and pressing technology in an operation.

The invention provides a fundus shooting control method and device and a fundus camera, and the method comprises the steps: obtaining a first recognition image when a first recognition object is located in a shooting range of the fundus camera; performing medical care identity verification on the first person according to the first identification image; in response to successful verification of the medical care identity of the first person, controlling the fundus camera to switch from the first state to a second state; wherein when the fundus camera is in the first state, the fundus camera is not allowed to acquire the patient information of the second person; and when the fundus camera is in the second state, allowing the fundus camera to acquire patient information of the second person. And when the fundus camera is in the first state, fundus shooting of the second person is not allowed. After the medical care identity of the first person is determined, fundus shooting is allowed to be performed on the second person, so that non-professionals are prevented from operating a fundus camera, accidental injuries to patients are reduced, and the safety is higher.

The invention discloses an ophthalmology intelligent auxiliary diagnosis method and system based on heterogeneous data collaboration, and the method comprises the steps: synchronously obtaining an ophthalmology multi-mode heterogeneous data set of a patient, including an OCT image, a fundus photograph and a visual field inspection report; the OCT image is subjected to retina layered structure segmentation, and an RNFL thickness distribution diagram is extracted; performing optic disc region positioning and blood vessel tree segmentation on the fundus photography to generate a CDR and a blood vessel curvature quantized value; mode deviation probability graph coding is carried out on the visual field inspection report, and a quadrant sensitivity missing matrix is output; an ophthalmic multimodal heterogeneous data set is associated through a patient unique identifier, and a RNFL thickness distribution map of OCT is mapped to an optic disc coordinate system of fundus photography by using feature-driven non-rigid registration. According to the invention, an ophthalmology multi-modal data cooperation barrier is broken through, an intelligent decision-making system with structure-function mutual verification is constructed, and the diagnosis reliability and clinical interpretability are significantly improved.

The present invention belongs to the technical field of auxiliary fundus screening for premature infants, and specifically relates to a method and system for managing auxiliary fundus screening for premature infants. The method comprises the following steps: obtaining various data of existing premature infants to train a prediction model, predicting fundus abnormalities of premature infants to be screened, screening premature infants who need fundus screening from the prediction results, collecting fundus images of premature infants to be screened, performing image analysis to determine whether there are fundus abnormalities, and outputting the results. Combined with the doctor's judgment, the existing fundus screening process for premature infants is improved, and premature infants who need fundus screening are screened in advance, so that all premature infants do not need to undergo eye treatment and then obtain fundus images, because the process of eye treatment and fundus photography is very painful for premature infants, and there are certain fundus screening problems. Image processing and analysis are used to assist in the judgment of fundus abnormalities, thereby improving the efficiency and accuracy of fundus screening.

The present application relates to a wide-angle fundus image analysis method and device, electronic equipment, and computer-readable storage medium. The method includes: preprocessing the original wide-angle fundus image to obtain a wide-angle fundus preprocessed image; inputting the wide-angle fundus preprocessed image into the optic disc macula precision positioning model to obtain the optic disc macula recognition result; inputting the wide-angle fundus preprocessed image into the fundus change feature recognition model to obtain the fundus change feature recognition result; processing the optic disc macula recognition result and the fundus change feature recognition result to obtain wide-angle fundus analysis data. It can quantitatively analyze the fundus changes related to high myopia in wide-angle fundus photography, improve the efficiency, accuracy and stability of fundus image analysis, and has the advantages of wide application range, high precision, flexibility and simplicity.

A portable remote fundus camera comprises an ear-hung frame, an automatic zoom lens for fundus photography, a control box, the control box is provided with a lens mounting through hole, a plurality of first contact points are arranged in the lens mounting through hole, the first contact points are electrically connected with a control circuit board arranged in the control box, the control circuit board is provided with a wireless control module for receiving remote control commands; one end of the automatic zoom lens is provided with a plurality of second contact points, the automatic zoom lens is mounted in the lens mounting through hole, so that each second contact point is in contact with the corresponding first contact point; the frame of the ear-hung frame is a rectangular frame, the control box is movably arranged in the rectangular frame, so that the automatic zoom lens can be aligned with the left eye or the right eye, a supporting bracket is arranged at the back of the rectangular frame, the edge of the supporting bracket in contact with the forehead of the patient is a concave arc edge, and a first positioning groove is arranged at the position of the supporting bracket in contact with the bridge of the nose of the patient.

A fundus photography device, an electronic device and an automatic dirt detection method are provided. The automatic dirt detection method includes the following steps. A first fundus image is obtained. A saturation channel is used to obtain a first object box from the first fundus image. A second fundus image is obtained. Grayscale values of the first fundus image and the second fundus image corresponding the first object box are compared to obtain a first correlation coefficient. If the first correlation coefficient is greater than a correlation coefficient threshold, the fundus photography device is deemed that there is a dirt. Contour contents of the first fundus image and the second fundus image corresponding the first object box are compared to obtain a first similarity index. If the first similarity index is greater than a similarity threshold, the fundus photography device is deemed that there is a dirt.

An image projection device includes a light source, a scanning unit that scans a light beam emitted from the light source, and an optical system that converges a plurality of light beams, which are emitted from the scanning unit at different times, at a convergence point in an eye of a user and then irradiates a retina of the user with the plurality of light beams to project an image, wherein diameters of the plurality of light beams incident on a cornea of the user are adjusted to 0.36 mm or greater and 0.46 mm or less when a half angle of a larger one of a horizontal angle of view and a vertical angle of view of an area where the retina is irradiated with the plurality of light beams at the convergence point is 10° or greater and 30° or less.

To provide an ophthalmologic imaging apparatus capable of easily adjusting a position relative to an eye to be examined when acquiring a tomographic image.SOLUTION: An ophthalmologic imaging apparatus includes: an examination optical system for examining a subject's eye, which is equipped with an objective lens facing the subject's eye; a driving unit that can adjust a relative position between the subject's eye and the objective lens; and a control unit to control the driving unit such that the relative position becomes a second relative position further separated from a first relative position for fundus imaging by a distance corresponding to a focal distance of the subject's eye.SELECTED DRAWING: Figure 3

The invention relates to the technical field of computer vision, and discloses an automatic image focus identification method based on ophthalmology detection, the method comprises the steps of setting an image quality control module, setting a disease course tracking module and setting a focus decoupling module, when multi-mode fundus image comprehensive analysis is carried out, cross-device image registration standard parameters are formulated, and the cross-device image registration standard parameters are formulated; layered recognition standards are set according to different focus types, normalization of various retinopathy detection is guaranteed, meanwhile, multi-source imaging data are aligned and fused on a retina layer, the problem of interlayer registration deviation between optical coherence tomography and fundus photography can be found in real time, and the accuracy and accuracy of retinopathy detection are improved. According to the method, accurate space positioning of focus such as diabetes mellitus macular oedema is guaranteed, focus measurement errors caused by equipment differences are effectively reduced, the reliability of quantitative analysis is improved, when abnormal evolution of the focus is detected, the diagnosis threshold value can be dynamically adjusted according to the standard disease course database, and the clinical guidance value of follow-up visit monitoring results is guaranteed.

The technology described herein is directed to a fundus camera and, more specifically, to a fundus camera having a display that projects active visual alignment stimuli onto an eye of an examinee via one or more components of an optimal assembly. The active visual alignment stimuli are dynamically adjusted to guide an examinee toward optical alignment for fundus imaging.

Preterm babies have a high risk of retinopathy. Doctors conduct fundus fluorescein angiography to determine the state of the blood vessels in their retinas. Disclosed is a system (100) for conducting fundus fluorescein angiography configured for light weight, small size, and providing a sharp, high contrast angiograph. The disclosed system uses a moulded annular light source, blue and white LEDs (120) for providing the illumination, an planar annular emission filter (125) for filtering the blue light, and imaging optics (130) configured for reducing aberration. The imaging optics (130) comprises a mechanical iris (136) to control the amount of light reaching an image sensor (150), a tuneable liquid lens (141) for focusing the image, a green barrier filter (146) that may be removed from the path of the light—for conducting fundus photography. The white LEDs and the mechanical iris (136) may be used for conducting fundus photography.

The application belongs to the technical field of full-eye imaging medical equipment, and particularly relates to a handheld full-eye OCT device for realizing wide-area imaging, which comprises an imaging system, a control system, a reference arm module and a sample arm module; the sample arm module comprises a galvanometer module and a switching module arranged in sequence on an output light path of a fiber interference module; the switching module comprises a third achromatic doublet lens group, a flip mirror structure and a fourth achromatic doublet lens group arranged in sequence on an output light path of the galvanometer module, and the third and fourth achromatic doublet lens groups form a telescope system; the switching module switches different imaging positions through the flip mirror structure. Compared with the prior art, the application solves the single imaging of the prior art which is mainly used for the anterior segment or posterior segment of the eye, and the field of view is small, it is difficult to fully cover the entire posterior segment of the eye, and the traditional fundus photography technology also has the problem of limited field of view; the scheme can realize wide-angle imaging of a large field of view in the posterior segment of the eye while switching the imaging positions of the anterior segment and the posterior segment.