184 results about "Abnormal thyroid" patented technology

The invention provides chimeric proteins having at least two functional protein units, each containing the dimerization domain of a member of the steroid/thyroid hormone nuclear receptor superfamily. The chimeric proteins can fold under crystallization conditions to form functional entities. The functional entities optionally contain a novel flexible peptide linker of variable lengths between at least two of the protein units. In a preferred embodiment, the linker is designed to be increased in increments of 12 amino acids each to aid in preparation of variant chimeric proteins. The DNA binding characteristics of the invention functional entities differ from those of wild-type complexes formed between “monomeric” receptors and their binding partners. Some functional entities, e.g. dimers expressed as fusion proteins, transactivate responsive promoters in a manner similar to wild-type complexes, while others do not promote transactivation and function instead essentially as constitutive repressors. The invention further provides nucleotide sequences encoding the invention chimeric proteins, cells containing such nucleotide sequences, and methods for using the invention chimeric proteins to modulate expression of one or more exogenous genes in a subject organism. In addition, isolated protein crystals suitable for x-ray diffraction analysis and methods for obtaining putative ligands for the invention chimeric proteins are provided.

The invention discloses a thyroid nodule diagnosis method based on a deep learning network, and belongs to the field of image processing and artificial intelligence aided disease diagnosis. The methodcomprises the following steps: searching an ultrasonic original image and a pathological report of a thyroid nodule of a thyroid patient, and constructing a thyroid nodule database; preprocessing theultrasonic image; performing semantic segmentation on the ultrasonic image preprocessed in the step 2 through a Deeplab v3+ method based on Xception-JFT, and forming a semantic segmentation result graph; judging benign and malignant thyroid nodules based on a deep learning network; and forming a thyroid nodule diagnosis information report. According to the method, the Deeplab v3+ algorithm basedon Xeption-JFT is adopted to establish the thyroid ultrasound image segmentation network model, the optimal segmentation effect is achieved by continuously improving the backbone network Xception, nodule information can be automatically and rapidly recognized under high accuracy and high robustness, image features are automatically extracted for accurate segmentation to obtain a better diagnosis result, and an objective reference is provided for clinical diagnosis.

The invention discloses an ultrasonic image thyroid nodule intelligent detection system based on a Faster-RCNN. When the adopted Faster-RCNN model is used for carrying out target detection, speed increases and storage space is optimized compared with a regional convolutional neural network RCNN so that rapid and automatic detection of benign and malignant nodules is realized. The features are optimized in the model construction. Key features in an ultrasonic diagnosis standard ACR TI-RADS are calculated before deep learning training, key image feature factors influencing clinical diagnosis aresearched and added to a convolutional neural network feature layer for improvement, a new identification model is constructed, and therefore the accuracy of a prediction result is improved.

The invention discloses a thyroid nodule automatic detection model construction method, system and device based on a convolutional neural network, and the thyroid nodule automatic detection model construction method comprises the steps: carrying out the noise reduction of thyroid ultrasonic image data, and obtaining a thyroid ultrasonic image training data set; based on the training data set, using a Yolov3 network to train a thyroid nodule detection model; based on the training data set, using a Resnet network to train a thyroid nodule benign and malignant identification model; and fusing thethyroid nodule detection model and the thyroid nodule benign and bad recognition model to generate a thyroid nodule automatic detection model.

The invention discloses a thyroid cytology multi-type cell detection method based on deep learning, and the method comprises the steps: obtaining a cell pathology slide image of a thyroid cell, obtaining a plurality of target images from the cell pathology slide image through sliding window scanning with selectable step length, the adjacent target images have an overlapping area, the target images are processed to obtain at least one feature image and confidence images, and the number of the confidence images is the same as the number of lesion types of lesion cells of the thyroid; and processing the at least one confidence coefficient image to obtain a plurality of confidence coefficients corresponding to different lesion types, obtaining a classification result matched with the target image based on the plurality of confidence coefficients, and processing the at least one confidence coefficient image based on the classification result to obtain an area matched with the classification result in the target image. Therefore, the detection efficiency of the detection system can be improved, and the marking cost can be reduced when the detection system is trained.

The invention discloses a thyroid nodule focus region generation data enhancement method based on a deep convolutional generative adversarial network. According to the method, thyroid ultrasound images of a real patient are classified according to benign nodules and malignant nodules; a focus area image is generated by using a deep convolutional generative adversarial network; According to the method for generating image fusion in the lesion area, the image which is generated from the lesion area and is close to the real lesion is selected and fused with the thyroid image of a normal person toachieve the purpose of data enhancement, and the method for generating image fusion in the lesion area improves the quality and diversity of enhanced data, enables the generated image to be close tothe real image to the maximum extent and is more credible.

The invention discloses a thyroid cell pathological section malignant region detection method based on deep learning. The method mainly comprises the following steps: performing pathological section on thyroid cells; carrying out digital processing on the image of the pathological section on a microscope, and smearing with different coloring agents to obtain a colored pathological section; cuttingthe complete pathological section into dices with proper sizes as the input of a deep neural network model; screening out invalid dices of the pathological sections; carrying out benign and malignantclassification on the pathological sections subjected to slicing and preliminary screening by adopting a weakly supervised learning method; constructing a random forest-based machine learning methodby utilizing a false positive removing scheme to remove false positive from a prediction result of benign and malignant classification; therefore, the detection accuracy can be further improved. A pathological section high-risk area display step includes normalizing the malignant prediction probability of each block and mapping the malignant prediction probability of each block into the original image to generate a thermodynamic diagram, and providing more intuitive visual display for pathologists.

The invention discloses a thyroid nodule Tirads grading automatic identification model construction method and device. The method comprises the following steps: S1, carrying out data preprocessing on a thyroid ultrasound image; s2, performing ellipse fitting conversion on the preprocessed thyroid ultrasound image to generate a segmentation mask as a training label; and S3, building a multi-task model based on a convolutional neural network, inputting the training label into the multi-task model, and performing training by adopting a preset loss function to obtain a trained thyroid nodule Tirads grading automatic identification model. According to the invention, in thyroid nodule TI-RADS grading automatic identification, the latest convolutional neural network framework is used for carrying out automatic identification tasks on thyroid ultrasound images in an end-to-end mode, TI-RADS grading is completed, detection work can be completed in the early stage of thyroid cancer, and therefore expensive work such as puncture does not need to be used; and a doctor is assisted to complete thyroid cancer screening.

The invention belongs to the technical field of image processing, and particularly relates to a thyroid nodule invasiveness prediction method based on target detection. The method comprises the following steps: S1, preprocessing a thyroid ultrasound image obtained clinically to obtain an original data set; S2, constructing a positioning network model of a network structure based on a traditional Faster RCNN, and pre-training the positioning network model; S3, extracting nodule form information in the ultrasonic image by using a positioning network, and obtaining aspect ratio information of the nodules and context information of gland tissues; S4, constructing a classification network model; S5, establishing a multi-model fusion thyroid nodule invasiveness prediction network, and predicting the thyroid nodule invasiveness in the ultrasonic image; and S6, training and updating the classification network model in the fused network model, and storing the model with the highest accuracy in the verification set. According to the method, end-to-end full-automatic auxiliary diagnosis can be achieved, and the defects that a traditional method is insufficient in accuracy and low in detection rate are overcome.

The invention provides a thyroid nodule analysis system based on elastic ultrasonic imaging, and relates to the technical field of computer-aided analysis. The system comprises: a data obtaining module which carries out thyroid nodule selection on an obtained elastic ultrasonic image, and obtains a thyroid nodule image; an edge recognition module used for carrying out edge recognition on the thyroid nodule image to obtain a nodule edge image; a feature analysis module used for respectively carrying out feature analysis on the thyroid nodule image and the nodule edge image to obtain a pluralityof image feature parameters; a feature selection module used for respectively calculating inter-class distances of the image feature parameters and adding the inter-class distances into a one-class interval sequence; and a nodule analysis module used for extracting the image feature parameters of the preset number of inter-class distances sorted in the front, and training to obtain a thyroid nodule state recognition model for subsequent thyroid nodule state recognition by taking the image characteristic parameters as input and the nodule state as output. The thyroid nodule analysis system hasthe advantage of effectively improving thyroid nodule state recognition accuracy.

The invention relates to a thyroid frozen section diagnosis method, and the method is suitable for a thyroid frozen section diagnosis system. The method comprises the following steps that S10, a microscope camera acquires a pathological image of a thyroid frozen section under a microscope and sends the pathological image to a processor; S20, the processor preprocesses the pathological image, so that the HSV color space of the pathological image is consistent with a set threshold value; S30, the processor detects the preprocessed pathological image, determines the range of the tumor area, outputs the pathological image marked with the range of the tumor area, or judges the yin and yang of the tumor in the pathological image, and outputs the pathological image marked with the negative and positive of the tumor; S40, the display receives and displays the marked pathological image from the processor. According to the detection method provided by the invention, the expenditure of a high scanner is saved, the diagnosis time in thyroid surgery is shortened, the surgery time is shortened, and the convenience is brought to rapid and accurate treatment.

The invention discloses a method and a device for automatically diagnosing benign and malignant thyroid nodules. The method comprises the following steps: step 1, carrying out noise reduction preprocessing on an original thyroid ultrasound image; 2, performing data enhancement on the preprocessed thyroid ultrasound image; 3, the thyroid ultrasound image after data enhancement being respectively put into three convolutional neural network models which are constructed through ResNet, DenseNet or ResNext in advance for training; and 4, carrying out model integration on images trained by different models in the step 3. According to the method, the problem that the automatic classification effect of benign and malignant thyroid nodules is poor is solved, the deep learning image automatic recognition technology is applied, the latest framework is used for extracting image features, the automatic classification task of benign and malignant thyroid nodules is completed in an end-to-end mode, and meanwhile high accuracy is guaranteed.

The invention discloses an SPECT thyroid imaging intelligent identification method based on a deep neural network, and relates to the technical field of image analysis and processing. The method comprises the following three steps: data acquisition, deep neural network model construction and model verification. According to the method, the SPECT thyroid image is processed by utilizing a computer technology, a doctor is replaced to complete identification of a thyroid shooting mode, manual operation can be reduced, a consistent processing result and considerable accuracy are achieved, and integration and large-scale application are facilitated.

The invention discloses a thyroid nodule semi-supervised segmentation method based on an attention mechanism. The method comprises the following steps of: 1, carrying out preprocessing of a thyroid ultrasonic image, and removing an edge information region in the image; 2, constructing a semi-supervised segmentation neural network, performing classification and segmentation prediction tasks on theultrasonic image, and adjusting a network structure to adapt to a specific application scene; 3, adding an attention mechanism into the semi-supervised segmentation neural network to improve the network effect; 4, measuring the performances of a semi-supervised segmentation algorithm and an existing full-supervised segmentation algorithm in the field of thyroid nodule auxiliary diagnosis through an intersection-parallel ratio and a Dice coefficient; and 5, continuously reducing the number of the pixel-level labels, and observing the change condition of the network performance. According to theinvention, the thyroid nodule semi-supervised segmentation method based on an attention mechanism benefits from the semi-supervised effect of a small number of pixel-level labels while keeping the high segmentation performance of the semi-supervised segmentation model, learns the real benign and malignant characteristics of the nodules and improves the benign and malignant classification capacity.

The invention provides molecular methods of screening chickens to determine those more likely to have a lean or fat phenotype by identifying the presence of at least one polymorphism in genetic material of a chicken in the thyroid hormone repressible gene (THRG) or its 3′ untranslated region (SEQ ID NO: 1) that is associated with a fat phenotype or a lean phenotype. The invention also provides methods of screening chickens to identify a polymorphism associated with a fat or lean phenotype. The invention further provides oligonucleotide probes and primers useful for detecting the polymorphisms associated with a fat or lean phenotype.

The invention discloses a thyroid cancer pathological image classification method based on deep learning, and mainly solves the problem of poor thyroid cancer pathological image classification effectof an existing method. According to the implementation scheme, the method comprises the following steps: reading a thyroid pathology image database, extracting low-level convolution and pooling features by a receptive field network, and fusing the features to obtain fused low-level features; extracting high-level features, namely predicted category vectors, from the fused low-level features through a capsule network; updating the category vector through a dynamic routing algorithm to obtain a final category vector, and calculating the modulus of the category vector through a compression activation function; carrying out image reconstruction on the vector with the maximum modulus value through a decoding reconstruction network; iteratively updating weights in the receptive field network andthe capsule network to complete model training; and finally, inputting a thyroid pathological image to be classified into the trained model to obtain a final classification result. The invention improves the classification accuracy of the thyroid cancer pathological images and can be used for computer-aided diagnosis.

The invention relates to a thyroid slice image classification model training method and device. The method comprises the following steps: acquiring a thyroid slice image under a preset magnification; dividing the thyroid slice image into a plurality of image blocks which are not overlapped with each other and have a preset size; classifying the image blocks through an image block classification model to obtain the probability that the image blocks are malignant tumors; in the training process of the image block classification model, using an optimization loss function, and adjusting model parameters through a back propagation algorithm; mapping the probability to the position of the image block corresponding to the probability in the thyroid slice image to obtain a probability heat map of the thyroid slice image; and extracting a characteristic value of a tumor from the probability heat map, inputting the characteristic value into an SVM classifier for training, and obtaining a thyroid slice image classification model. By adopting the method, the model classification accuracy can be improved.

The invention relates to a method for generating medical ultrasonic image data based on an adversarial network, and the method comprises the steps: enabling the adversarial network to be applied to anROI (region of interest) data set of thyroid ultrasonic data, and proving that a WGAN (generative adversarial network) can generate an ultrasonic image with better quality; expanding the benign thyroid ultrasonic data ROI data set and the malignant thyroid ultrasonic data ROI data set by using the WGAN in the data set; and comparing the performance of the VGG-16 network on the enhanced data set and the original data set, and proving the feasibility of performing thyroid ultrasound data set data enhancement through the generative adversarial network. The method is scientific and reasonable indesign, generates medical ultrasonic image data through the generative adversarial network, enriches a data set, and improves the adaptability of the model and the identification capability of a target.

The invention discloses a thyroid ultrasound image classification and segmentation network, a training method, a device and a medium, and belongs to the technical field of medical information. The network comprises a coding stage, a decoding stage and jump connection between the coding stage and the decoding stage, an attention mechanism module is arranged in the coding stage, so that the network pays more attention to the difference between a thyroid structure and surrounding tissues, and in the coding stage of the network, an output feature map is used as the input of a classification network, so that feature sharing can be carried out on the segmentation and classification tasks, the thyroid ultrasound images are classified and segmented at the same time through the same network, classification and segmentation task training is carried out at the same time in training, and the segmentation and classification accuracy is improved.

The invention provides a method for detecting nodules in a thyroid ultrasound image based on deep learning. The method comprises the steps of preprocessing the thyroid ultrasound image; extracting features of the preprocessed thyroid ultrasound image to obtain a feature image; respectively inputting the obtained feature images into corresponding classification and regression structures, and obtaining specific position information of a thyroid nodule region in each feature image; for the classification loss, the central point distance regression loss and the offset loss generated by calculation of the feature images input into the corresponding classification and regression structures, obtaining the total loss of the to-be-trained model through weighted summation calculation; and training and testing the to-be-trained model. According to the method, an anchor box does not need to be arranged, the nodule region in the thyroid ultrasound image is efficiently detected, calculation and resource waste related to the anchor box are avoided, the training speed is increased, and the generalization performance of an experimental result is enhanced. The invention further provides a device for detecting the nodules in the thyroid ultrasound image based on deep learning.