96 results about "Chest radiograph" patented technology

A method, system, and computer program product for modifying an appearance of an anatomical structure in a medical image, e.g., rib suppression in a chest radiograph. The method includes: acquiring, using a first imaging modality, a first medical image that includes the anatomical structure; applying the first medical image to a trained image processing device to obtain a second medical image, corresponding to the first medical image, in which the appearance of the anatomical structure is modified; and outputting the second medical image. Further, the image processing device is trained using plural teacher images obtained from a second imaging modality that is different from the first imaging modality. In one embodiment, the method also includes processing the first medical image to obtain plural processed images, wherein each of the plural processed images has a corresponding image resolution; applying the plural processed images to respective multi-training artificial neural networks (MTANNs) to obtain plural output images, wherein each MTANN is trained to detect the anatomical structure at one of the corresponding image resolutions; and combining the plural output images to obtain a second medical image in which the appearance of the anatomical structure is enhanced.

The invention discloses an automatic pulmonary tuberculosis detection system on an X-ray chest radiograph based on a characteristic pyramid network (FPN). An X-ray chest radiograph of pulmonary tuberculosis is marked; a Faster R-CNN network learning module with an FPN as the rear end is adopted for training and learning, pulmonary tuberculosis lesion symptoms are mastered, and the automatic diagnosis and detection capacity of the pulmonary tuberculosis lesion symptoms is obtained, so that the automatic detection, positioning and probability prediction of the pulmonary tuberculosis lesion are achieved, and a final pulmonary tuberculosis detection result is obtained. The FPN serves as the rear end of the detection network, the semantic features in a multi-scale network layer can be better combined, each layer is independently predicted, and fusion is finally carried out, so that focuses of different scales can be better detected. Based on a recognition technology of the deep learning network to the digital image, the automatic detection, positioning and probability prediction of the tuberculosis focus are realized, the accuracy of the focus detection is improved, and the risk of thedelayed treatment of a tuberculosis patient is reduced.

A method of generating a pulmonary nodule image from a chest radiograph. The method includes the steps of: producing a map of a clear lung field; removing low frequency variation from the clear lung field to generate a level image; and performing at least one grayscale morphological operation on the level image to generate a nodule-bone image. Pulmonary nodules can be detected using the nodule-bone image by the further steps of: pulmonary nodules from a chest radiograph. The method includes the steps of: identifying candidate nodule locations in the nodule-bone image; segmenting a region around each candidate nodule location in the nodule-bone image; and using the features of the segmented region to determine if a candidate is a nodule.

The invention provides a construction method and application of a thoracic disease detection model. The construction method comprises the following steps: A, acquiring chest X-ray images of a specified number of thoracic disease patients; B, performing image preprocessing on the X-ray images to obtain pre-processed image data; and C, inputting the pre-processed image data to a convolution neural network model for training to obtain the trained model for thoracic disease detection. The thoracic disease detection model can accurately predict a type and a location of a thoracic disease, the diagnosis time of the doctor is greatly shortened, and the rate of missed diagnosis and misdiagnosis is lowered.

The invention discloses an X-ray chest radiograph bone suppression processing method based on wavelet decomposition and a convolutional neural network. By adopting a convolutional neural network structure and using a chest radiograph image wavelet coefficient as the input, a wavelet coefficient image of a corresponding bone image or soft tissue image is predicted. The existing bone image or soft tissue image artificial neural network prediction method processes an original chest radiograph image by adopting a relatively complex contrast normalization method, whereas this method processes the input chest radiograph image in a wavelet domain, and can normalize the amplitude by adopting a simple method; and the existing bone image or soft tissue image artificial neural network prediction method needs to design an image feature extraction method as the input of the artificial neural network, whereas this method completes an image feature extraction process by directly using the wavelet decomposition image of the chest radiograph image as an input, training the convolutional neural network to learn automatically and optimizing the convolution kernel, so the image feature extraction method does not need to be designed.

A method for automatically segmenting lung regions in a chest radiographic image comprising; providing an input digital chest radiograph image; preprocessing the input digital radiographic image; extracting the chest body midline and lung centerlines from the preprocessed image. Locating one-by-one, the chest body model, the spine model and the two lung models in the image based on the extracted chest body midline and two lung centerlines; and detecting the lung contours by deforming the lung shape models to converge to the true lung boundaries as a function of the extracting and locating image processing.

A method for automatic construction of 2D statistical shape models for the lung regions in chest radiographic images. The method includes: extracting the anatomical structure contours from a chest radiograph image; generating a polygonal shape approximation for each contour; aligning a plurality of polygonal shape approximations by minimizing their distance; assigning a plurality of landmarks on each shape contour; and determining a statistical shape model using aligned shape contours.

The invention provides a pulmonary nodule detection method and a system based on image enhancement. The method comprises steps: an anteroposterior view chest radiograph after pre-processing is dividedto a training set, a verification set and a test set according to a preset proportion; pulmonary nodule areas cut out from the anteroposterior view chest radiograph in the training set and the verification set are used as negative samples for model training, other areas in the anteroposterior view chest radiograph are randomly cut as positive samples for model training, and the negative samples are subjected to deformation processing to increase the number of negative samples; and a sliding window is used to divide the whole JPG anteroposterior view chest radiograph to non-overlapped image blocks, and the image blocks are inputted to a convolution neural network model to judge whether the image blocks are positive samples or negative samples. The pulmonary nodule detection efficiency canbe improved, the false positive rate is reduced, and through carrying out deformation processing on the negative samples, overfitting of the model due to insufficient chest radiograph data can be overcome.

The invention provides a lung tissue image segmentation method based on deep learning, and belongs to the technical field of medical image segmentation. The lung tissue image segmentation method comprises the steps that an X-ray chest radiograph image is input into a segmentation model, the segmentation model is obtained through training of multiple sets of training data, and each set of trainingdata in the multiple sets of training data comprises the X-ray chest radiograph image and a corresponding gold standard used for identifying lung tissue; and output information of the model is obtained, and the output information comprises a segmentation result of the lung tissue in the X-ray chest radiography image. According to the lung tissue image segmentation method, the segmentation of the lung tissue of the X-ray chest radiography is realized through an improved Deeplabv3+ deep learning method, and the problems of local convergence and false positive segmentation when the lung tissue issegmented by using a traditional method are solved; the lung tissue image segmentation method respectively obtains 95.3% of MIoU and 94.8% of MIoU on the public data set and the pneumoconiosis data set; and the false positive problem of the FCN network is solved, and the segmentation accuracy of ribs at the thoracic diaphragm angle and on the X-ray chest radiography in the SCAN network method isimproved.

The invention discloses a chest X-ray film denoising method based on a deep convolutional neural network. The method comprises the steps of collecting chest X-ray film data, performing data format conversion, performing preprocessing to obtain an original image block for training, adding Gaussian noise to generate a noisy image block, and taking the paired original image block and noisy image block as a training data set; Constructing a convolutional neural network model for removing chest X-ray film noise, wherein the convolutional neural network model comprises a deep convolutional neural network and a residual error network; Taking the paired original image blocks and noisy image blocks as input, and performing training to obtain a trained convolutional neural network model X-ReCNN; taking the chest X-ray data of the noise to be removed as an input characteristic map of X-ReCNN, removing noise, and outputting the predicted denoised chest X-ray film.. According to the method, the noise in the chest X-ray film can be removed with light weight, high speed and high precision, the parameters of a network structure are greatly reduced, and the network training time is shortened.

The present invention provides a method and system for detecting lung nodules based on data enhancement. The method includes: classifying a preprocessed chest radiograph into a training set, a verification set and a test set according to a preset proportion; in the training set and the verification set using lung nodule areas extracted from the chest radiograph as model training positive samples,cutting the other areas in the chest radiograph at random as model training negative samples, and fusing at least two negative samples to increase the number of negative samples; dividing the whole JPG image of the chest radiograph into non-overlapped image blocks by a sliding window, and then inputting the image blocks into a convolution neural network model to determine whether the image blocksare positive samples or negative samples. The method and system can improve the detection efficiency of the lung nodules and reduce a false positive rate, and can overcome the over-fitting phenomenonof the model caused by insufficient chest radiograph data by deforming the negative samples.

The invention discloses a deep learning-based intelligent X-ray film diagnosis method. The method comprises the following steps: image data of chest X-ray films stored in a preset memory are acquired;the image data of the chest X-ray films are augmented in a preset mode; the augmented image data are subjected to preprocessing operation to enable data features to meet a standard; the preprocessedimage data are classified to form a plurality of classification models, and model training is designed for each classification model to generate a model training prediction result; a final CNN featuremap is acquired, and according to the CNN feature map, a thermodynamic map is generated; and according to the model training prediction result of each classification model, an integration result is calculated and obtained. Deep learning on pulmonary disease characteristics in a large number of chest X-ray films can be carried out, multiple pulmonary diseases can be accurately predicted, a diagnosis basis is provided, the prediction time is greatly less than manual diagnosis time, and the time of a doctor is saved.

The invention discloses a chest radiography lung field segmentation model establishment based on multi-scale feature fusion and segmentation method. A segmentation model establishing method comprisesthe following steps: firstly, processing an X-ray chest radiograph; obtaining a preprocessed picture and a recoded mask picture, then constructing an X-ray chest radiography lung field segmentation network based on multi-scale convolution and a feature pyramid, and finally training the segmentation network by using the preprocessed picture as an input of the segmentation network and using the recoded mask picture as an output of the segmentation network to obtain a trained segmentation model; and based on the obtained segmentation model, preprocessing any to-be-processed X-ray chest radiograph, and inputting the preprocessed X-ray chest radiograph into the segmentation model to obtain a lung field segmentation result. According to the method, multi-resolution feature fusion is provided incombination with a feature pyramid theory, wherein the segmentation results with different resolutions can be fused, so that the segmentation effect is improved.

A computer aided detection (CAD) method and system is configured to input chest radiographs and generate overlay layer for labeling and tracing tubes detected within the image. The input image is first preprocessed and then segmented according to anatomy. Seeds are generated from the segmented image and then used to grow the region. Tubes are selected from the grown region and data is overlayed on the image based on the grown seed path.

Acquisition techniques for dual energy (DE) chest imaging system. Technique factors include the added x-ray filtration, kVp pair, and the allocation of dose between low- and high-energy projections, with total dose equal to or less than that of a conventional chest radiograph. Factors are described which maximize lung nodule detectability as characterized by the signal difference to noise ratio (SDNR) in DE chest images. kVp pair and dose allocation are described using a chest phantom presenting simulated lung nodules and ribs for thin, average, and thick body habitus. Low- and high-energy techniques ranged from 60-90 kVp and 120-150 kVp, respectively, with peak soft-tissue SDNR achieved at [60/120] kVp for patient thicknesses and levels of imaging dose. A strong dependence on the kVp of the low-energy projection was observed.

A method for identifying a projection view and an orientation of a chest radiograph. The method includes the steps of: providing an input digital image of the chest radiograph; preprocessing the input digital radiographic image; classifying the view of the input digital radiographic image; and determining the orientation of the input digital radiographic image.

A method for assessing bone status is disclosed. The method for assessing bone status comprises steps of: obtaining a chest radiograph, recognizing a target bone on the chest radiograph by active shape models, detecting edges of a cortical bone of the target bone by intelligent scissors, and calculating a parameter of bone status through the cortical bone. The present invention increases the diagnosis value of the chest radiography and provides a simple, economic, rapid and reliable assessment of bone status.

The invention relates to an image analysis method, a computer device and a storage medium. The whole process of analyzing the medical image from the analysis of the disease type of the medical image to be analyzed, the call to the corresponding disease type analysis network, and the analysis network to be analyzed is automatically performed by the computer device, and the whole process can be obtained without manual intervention. The analysis result of the medical image to be analyzed. Thus, the application of the method for diagnosing the disease according to the chest radiograph can not onlygreatly improve the efficiency of analyzing the medical image to be analyzed, but also ensure the accuracy of the analysis result.

A method for determining whether a first medical image and a second medical image are medical images of the same patient, comprising selecting a first region in the first medical image; selecting a second region in the second medical image; determining a common region based on a boundary of the first region and a boundary of the second region; calculating a correlation coefficient based on image data from the first medical image in the common region and image data from the second medical image in the common region; and determining whether the first medical image and the second medical image are medical images of the same patient based on the correlation coefficient. Biological fingerprints from parts of chest radiographs such as thoracic fields, cardiac shadows, lung apices, superior mediastinum, and the right lower lung that includes the costophrenic angle, are used for the purpose of patient recognition and identification.

The invention discloses an X-ray chest radiograph identification method and device, and the method comprises the steps: enabling the image data corresponding to a plurality of X-ray chest radiographswith positive positions and lateral positions distinguished to serve as the first input data of a deep convolutional network, and training the deep convolutional network; Taking the image data corresponding to the plurality of X-ray chest radiographs which are distinguished from the normal positions and the lateral positions as second input data of the deep convolutional network, and verifying thetrained deep convolutional network; And under the condition that the verification accuracy is higher than a first threshold value, inputting the X-ray chest radiograph to be distinguished into the trained deep convolutional network to obtain a recognition result. And the normal position chest radiograph and the lateral position chest radiograph can be efficiently and accurately distinguished froma large number of X-ray chest radiographs. The problem that efficiency is low due to the fact that the front lateral chest radiograph is recognized and distinguished through human eyes in the prior art is solved.