7 results about "Optic disk" patented technology

The invention discloses a to-be-sealed optical fiber transportation device, which belongs to the technical field of transportation carriers, and is technically characterized by comprising a square mounting plate and further comprising a double-side optical fiber disc fixing mechanism, the double-side optical fiber disc fixing mechanism is arranged on the square mounting plate, one end of the double-side optical fiber disc fixing mechanism is fixedly connected with the square mounting plate, and the other end of the double-side optical fiber disc fixing mechanism is arranged on the square mounting plate; moving mechanisms are arranged on the side surfaces of the square mounting plate and are symmetrically arranged relative to the square mounting plate; the direction changing mechanism is arranged on one side of the moving mechanism, one end of the direction changing mechanism is fixedly connected with the moving mechanism, the other end of the direction changing mechanism is fixedly connected with the square mounting plate, the direction changing mechanism comprises a mounting assembly, a direction changing assembly and a direction changing connecting rod, the mounting assembly is fixedly connected with the moving mechanism, and the direction changing assembly is arranged in the mounting assembly; the redirection assembly is movably connected with the mounting assembly, one end of the redirection assembly is fixedly connected with the redirection connecting rod, and the redirection connecting rod is fixedly connected with the square mounting plate.

This invention presents a passive domain adaptive fundus segmentation method based on evidence representation and marginal screening. Under the condition that the source domain training images and their pixel-level annotations are inaccessible, a Student network and a Teacher network are constructed to learn segmentation of the target domain fundus image. The network outputs positive foreground evidence and negative background evidence for each segmentation channel, and constructs a pixel-level Beta distribution. Based on the Beta distribution, foreground probability, evidence margin, and evidence strength are calculated. Reliable positive pseudo-labels are obtained through joint screening, and a weighted segmentation loss is constructed by combining pseudo-label weights. Simultaneously, regularization loss and evidence strength constraint loss are introduced to optimize the Student network. Finally, the exponential moving average coefficient is dynamically adjusted based on the amount of evidence to update the Teacher network parameters. This method can effectively suppress the propagation of pseudo-label noise and improve the accuracy, stability, and cross-domain adaptability of optic cup and optic disc segmentation in the target domain fundus image.

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.

An apparatus includes an obtaining unit configured to obtain, using an optical coherence tomography, an analysis map for a disk and an analysis map for a macular area, which are analysis results of three-dimensional data obtained by capturing an image of a region of a fundus of a subject's eye that includes the disk and the macular area, and a control unit configured to cause a display unit to display side by side a two-dimensional image of the region including the disk and the macular area, the analysis map for the optic disk, and the analysis map for the macular area.

The invention discloses a lightweight optic disc segmentation method and system, and relates to the technical field of medical image segmentation. Comprising the following steps: carrying out data enhancement processing on a public data set iChallenge-PM, an iChallenge-AMD and a Drishiti-GS; a lightweight segmentation model is constructed, and the model comprises a C2f module used for extracting and fusing eye fundus image features; a GlobalEdgeInformationTransfer module, which is used for enhancing the edge feature extraction and the multi-scale fusion of the eye fundus image; the Wavelet Pooling module is used for realizing eye fundus image resolution conversion by using a fixed wavelet filter and reducing trainable parameters; and the C2fgConv module introduces a gating mechanism to optimize eye fundus image feature extraction and reduce parameter quantity. Through multi-scale feature extraction and fusion, WaveletPooling application and C2fgConv design, while the optic disk segmentation precision is ensured, model parameters are effectively reduced, light weight is realized, the training efficiency and generalization ability are improved, and the method is suitable for optic disk segmentation tasks under different resource conditions.

The present invention relates to the field of animal disease models. A method for constructing and using a pathological myopia animal model provided by the present invention includes: inducing with a negative lens in combination with intervention with an mTOR activator to obtain a pathological myopia animal model; the present invention has found through research that when an mTOR activator based on the key regulatory pathway of myopic axial elongation is combined with negative lens induction to intervene in animals, it can efficiently induce animals to develop pathological myopia. All animals showed significant tigroid fundus (pathological myopia in stage M1), and 25% of guinea pigs showed diffuse and patchy choroidal atrophy around the optic disc, which is characteristic of pathological myopia (pathological myopia in stages M2 - M3). This kind of pathological myopia animal model is easy to induce and highly similar to the fundus changes of human pathological myopia, which can fill the gap in pathological myopia animal models and can be used as a new animal model for exploring the causes and mechanisms of the occurrence and development of pathological myopia.