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公开(公告)号:US09741116B2
公开(公告)日:2017-08-22
申请号:US14914896
申请日:2014-08-28
IPC分类号: G06K9/00 , G06T7/00 , A61B1/31 , A61B1/00 , G06T5/20 , G06T7/73 , G06T7/12 , G06T7/13 , G06T7/41 , A61B6/02 , A61B5/00
CPC分类号: G06T7/0016 , A61B1/00009 , A61B1/31 , A61B5/4255 , G06T5/20 , G06T7/0012 , G06T7/12 , G06T7/13 , G06T7/41 , G06T7/73 , G06T2207/10016 , G06T2207/10024 , G06T2207/10068 , G06T2207/20024 , G06T2207/20168 , G06T2207/30032
摘要: A system and method is provided for automated polyp detection in optical colonoscopy images. The system includes an input configured to acquire a series of optical images, and a processor configured to process the optical images. Processing steps include performing a boundary classification with steps comprising locating a series of edge pixels using at least one acquired optical image, selecting an image patch around each said edge pixel, performing a classification threshold analysis on each image patch of said edge pixels using a set of determined boundary classifiers, and identifying, based on the classification threshold analysis, polyp edge pixels consistent with a polyp edge. Processing steps for the processor also include performing a vote accumulation, using the identified polyp edge pixels, to determine a polyp location. The system also includes an output configured to indicate potential polyps using the determined polyp location.
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公开(公告)号:US10861151B2
公开(公告)日:2020-12-08
申请号:US15750989
申请日:2016-08-08
申请人: Jianming Liang , Nima Tajbakhsh
发明人: Jianming Liang , Nima Tajbakhsh
摘要: Mechanisms for simultaneously monitoring colonoscopic video quality and detecting polyps in colonoscopy are provided. In some embodiments, the mechanisms can include a quality monitoring system that uses a first trained classifier to monitor image frames from a colonoscopic video to determine which image frames are informative frames and which image frames are non-informative frames. The informative image frames can be passed to an automatic polyp detection system that uses a second trained classifier to localize and identify whether a polyp or any other suitable object is present in one or more of the informative image frames.
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公开(公告)号:US20200380695A1
公开(公告)日:2020-12-03
申请号:US16885579
申请日:2020-05-28
摘要: Methods, systems, and media for segmenting images are provided. In some embodiments, the method comprises: generating an aggregate U-Net comprised of a plurality of U-Nets, wherein each U-Net in the plurality of U-Nets has a different depth, wherein each U-Net is comprised of a plurality of nodes Xi,j, wherein i indicates a down-sampling layer the U-Net, and wherein j indicates a convolution layer of the U-Net; training the aggregate U-Net by: for each training sample in a group of training samples, calculating, for each node in the plurality of nodes Xi,j, a feature map xi,j, wherein xi,j is based on a convolution operation performed on a down-sampling of an output from Xi−1,j when j=0, and wherein xi,j is based on a convolution operation performed on an up-sampling operation of an output from Xi+1,j−1 when j>0; and predicting a segmentation of a test image using the trained aggregate U-Net.
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4.
公开(公告)号:US20130070997A1
公开(公告)日:2013-03-21
申请号:US13621837
申请日:2012-09-17
申请人: Nima Tajbakhsh , Hong Wu , Wenzhe Xue , Jianming Liang
发明人: Nima Tajbakhsh , Hong Wu , Wenzhe Xue , Jianming Liang
IPC分类号: G06K9/62
CPC分类号: G06K9/62
摘要: Systems, methods, and media for on-line boosting of a classifier are provided, comprising: receiving a training sample; for each of a plurality of features, determining a feature value for the training sample and the feature, using the feature value to update a histogram, and determining a threshold for a classifier of the feature; for each of the plurality of features, classifying the training sample using the threshold for the classifier of the feature and calculating an error associated with the classifier; selecting a plurality of best classifiers from the classifiers; and, for each of the plurality of best classifiers, assigning a voting weight to the one of the plurality of best classifiers.
摘要翻译: 提供了用于在线升压分类器的系统,方法和介质,包括:接收训练样本; 对于多个特征中的每一个,确定所述训练样本和所述特征的特征值,使用所述特征值来更新直方图,以及确定所述特征的分类器的阈值; 对于所述多个特征中的每一个,使用所述特征的分类器的阈值对所述训练样本进行分类,并计算与所述分类器相关联的错误; 从分类器中选择多个最佳分类器; 并且对于所述多个最佳分类器中的每一个,为所述多个最佳分类器之一分配投票权重。
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公开(公告)号:US09959615B2
公开(公告)日:2018-05-01
申请号:US15200742
申请日:2016-07-01
申请人: Jianming Liang , Nima Tajbakhsh
发明人: Jianming Liang , Nima Tajbakhsh
IPC分类号: G06K9/00 , G06T7/00 , A61B5/02 , A61B6/03 , A61B6/00 , A61B8/08 , G06K9/62 , G06K9/46 , A61B5/055
CPC分类号: G06T7/0012 , A61B5/02007 , A61B5/055 , A61B6/032 , A61B6/504 , A61B6/5211 , A61B6/5223 , A61B8/0891 , G06K9/4628 , G06K9/6272 , G06K2209/05 , G06T2207/20084 , G06T2207/30061 , G06T2207/30101 , G06T2207/30172
摘要: A system and method for detecting pulmonary embolisms in a subject's vasculature are provided. In some aspects, the method includes acquiring a set of images representing a vasculature of the subject, and analyzing the set of images to identify pulmonary embolism candidates associated with the vasculature. The method also includes generating, for identified pulmonary embolism candidates, image patches based on a vessel-aligned image representation, and applying a set of convolutional neural networks to the generated image patches to identify pulmonary embolisms. The method further includes generating a report indicating identified pulmonary embolisms.
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公开(公告)号:US20170238909A1
公开(公告)日:2017-08-24
申请号:US15049935
申请日:2016-02-22
申请人: Jae Yul Shin , Nima Tajbakhsh , Jianming Liang
发明人: Jae Yul Shin , Nima Tajbakhsh , Jianming Liang
IPC分类号: A61B8/08 , A61B5/0402 , A61B8/00 , A61B5/00
CPC分类号: A61B8/5284 , A61B5/02007 , A61B5/0402 , A61B5/0456 , A61B5/1075 , A61B5/489 , A61B5/7267 , A61B5/7289 , A61B5/7485 , A61B8/085 , A61B8/0891 , A61B8/469 , A61B8/5223 , A61B8/5292
摘要: A system for automatically determining a thickness of a wall of an artery of a subject includes an ECG monitoring device that captures an electrocardiogram (ECG) signal from the subject, and an ultrasound video imaging device, coupled to the ECG monitoring device, that receives the ECG signal from the ECG monitoring device, and captures a corresponding ultrasound video of the wall of the artery of the subject. The system produces a plurality of frames of video comprising the ultrasound video of the wall of the artery of the subject and an image of the ECG signal. A processor is configured to select a subset of the plurality of frames of the ultrasound video based on the image of the (ECG) signal, locate automatically a region of interest (ROI) in each frame of the subset of the plurality of frames of the video using a machine-based artificial neural network and measure automatically a thickness of the wall of the artery in each ROI using the machine-based artificial neural network.
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公开(公告)号:US20170004619A1
公开(公告)日:2017-01-05
申请号:US15200742
申请日:2016-07-01
申请人: Jianming Liang , Nima Tajbakhsh
发明人: Jianming Liang , Nima Tajbakhsh
CPC分类号: G06T7/0012 , A61B5/02007 , A61B5/055 , A61B6/032 , A61B6/504 , A61B6/5211 , A61B6/5223 , A61B8/0891 , G06K9/4628 , G06K9/6272 , G06K2209/05 , G06T2207/20084 , G06T2207/30061 , G06T2207/30101 , G06T2207/30172
摘要: A system and method for detecting pulmonary embolisms in a subject's vasculature are provided. In some aspects, the method includes acquiring a set of images representing a vasculature of the subject, and analyzing the set of images to identify pulmonary embolism candidates associated with the vasculature. The method also includes generating, for identified pulmonary embolism candidates, image patches based on a vessel-aligned image representation, and applying a set of convolutional neural networks to the generated image patches to identify pulmonary embolisms. The method further includes generating a report indicating identified pulmonary embolisms.
摘要翻译: 提供了一种用于检测受试者脉管系统中肺栓塞的系统和方法。 在一些方面,所述方法包括获取表示所述对象脉管系统的图像集合,以及分析所述图像集合以识别与脉管系统相关联的肺栓塞候选者。 该方法还包括为识别的肺栓塞候选者生成基于血管对准图像表示的图像斑块,以及将一组卷积神经网络应用于产生的图像斑块以识别肺栓塞。 该方法还包括产生指示确定的肺栓塞的报告。
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公开(公告)号:US20220262105A1
公开(公告)日:2022-08-18
申请号:US17625313
申请日:2020-07-17
申请人: Zongwei ZHOU , Vatsal SODHA , Md, Mahfuzur RAHMAN SIDDIQUEE , Ruibin FENG , Nima TAJBAKHSH , Jianming LIANG , Arizona Board of Regents on behalf of Arizona State University
发明人: Zongwei Zhou , Vatsal Sodha , Md Mahfuzur Rahman Siddiquee , Ruibin Feng , Nima Tajbakhsh , Jianming Liang
IPC分类号: G06V10/774 , G06V10/82 , G06V10/98 , G06V10/776
摘要: Described herein are means for generating source models for transfer learning to application specific models used in the processing of medical imaging. In some embodiments, the method comprises: identifying a group of training samples, wherein each training sample in the group of training samples includes an image; for each training sample in the group of training samples: identifying an original patch of the image corresponding to the training sample; identifying one or more transformations to be applied to the original patch; generating a transformed patch by applying the one or more transformations to the identified patch; and training an encoder-decoder network using a group of transformed patches corresponding to the group of training samples, wherein the encoder-decoder network is trained to generate an approximation of the original patch from a corresponding transformed patch, and wherein the encoder-decoder network is trained to minimize a loss function that indicates a difference between the generated approximation of the original patch and the original patch. The source models significantly enhance the transfer learning performance for many medical imaging tasks including, but not limited to, disease/organ detection, classification, and segmentation. Other related embodiments are disclosed.
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9.
公开(公告)号:US20180225820A1
公开(公告)日:2018-08-09
申请号:US15750989
申请日:2016-08-08
申请人: Jianming Liang , Nima Tajbakhsh
发明人: Jianming Liang , Nima Tajbakhsh
CPC分类号: G06T7/0012 , G06K9/6255 , G06K9/627 , G06K9/6277 , G06K2209/053 , G06T7/12 , G06T2207/10068 , G06T2207/20072 , G06T2207/20081 , G06T2207/20084 , G06T2207/30028 , G06T2207/30032 , G06T2207/30168 , G16H30/40 , G16H50/20
摘要: Mechanisms for simultaneously monitoring colonoscopic video quality and detecting polyps in colonoscopy are provided. In some embodiments, the mechanisms can include a quality monitoring system that uses a first trained classifier to monitor image frames from a colonoscopic video to determine which image frames are informative frames and which image frames are non-informative frames. The informative image frames can be passed to an automatic polyp detection system that uses a second trained classifier to localize and identify whether a polyp or any other suitable object is present in one or more of the informative image frames.
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10.
公开(公告)号:US20190332896A1
公开(公告)日:2019-10-31
申请号:US16397990
申请日:2019-04-29
申请人: Jianming Liang , Zongwei Zhou , Jae Shin
发明人: Jianming Liang , Zongwei Zhou , Jae Shin
IPC分类号: G06K9/62
摘要: Methods, systems, and media for selecting candidates for annotation for use in training classifiers are provided. In some embodiments, the method comprises: identifying, for a trained Convolutional Neural Network (CNN), a group of candidate training samples, wherein each candidate training sample includes a plurality of patches; for each patch of the plurality of patches, determining a plurality of probabilities, each probability being a probability that the patch corresponds to a label of a plurality of labels; identifying a subset of the patches in the plurality of patches; for each patch in the subset of the patches, calculating a metric that indicates a variance of the probabilities assigned to each patch; selecting a subset of the candidate training samples based on the metric; labeling candidate training samples in the subset of the candidate training samples by querying an external source; and re-training the CNN using the labeled candidate training samples.
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