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公开(公告)号：US10818027B2
公开(公告)日：2020-10-27
申请号：US16077523
申请日：2017-05-24
Inventor： Shoujun Zhou , Baolin Li , Cheng Wang , Pei Lu
Abstract: A method and an apparatus for extracting a centerline of a tubular object are provided. The method includes: preprocessing an image of the tubular object whose centerline is to be extracted to obtain an enhanced image, acquiring a gradient vector flow field of the enhanced image; acquiring a deformation force parameter based on the gradient vector flow field and extracting ridge points of the tubular object from the enhanced image, establishing a regularized open curve deformable model; if a deformation end condition is not met, deforming and processing one ridge line segment in the initial ridge line segment list based on the model to obtain a centerline segment of the tubular object, updating the initial ridge line segment list based on the ridge line segment traversed; if the deformation end condition is met, generating a centerline of the tubular object based on the centerline segments.
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公开(公告)号：US20200309896A1
公开(公告)日：2020-10-01
申请号：US16731046
申请日：2019-12-31
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： YUBIN ZHAO , FANGMIN LI , CHENGZHONG XU
Abstract: This application relates to an indoor positioning method and system and an electronic device. The method includes: calculating distances between an unknown node and at least three known nodes; obtaining at least three square regions around the at least three known nodes by using the distances as radiuses, and obtaining a minimum overlapping region based on overlapping parts of the at least three square regions; reducing the minimum overlapping region in an equal proportion by using a geometric center of the minimum overlapping region as a center to obtain a new square region; calculating an optimal vertex location of the new square region through iteration; and forming a new smaller region around the optimal vertex location by using the optimal vertex location as a new central point, and using an optimal vertex location of the smaller region as an estimated location of the unknown node.
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公开(公告)号：US20200292651A1
公开(公告)日：2020-09-17
申请号：US16888882
申请日：2020-06-01
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Hairong ZHENG , Xin LIU , Chao ZOU , Chuanli CHENG , Yangzi QIAO , Changjun TIE
Abstract: The present invention provides a magnetic resonance temperature imaging method and apparatus, and relates to the field of magnetic resonance. According to the magnetic resonance temperature imaging method and apparatus, accuracy and precision of a water-fat tissue temperature image at a current moment are improved by using a two-step iterative temperature estimation algorithm, a magnetic resonance signal model includes multiple fat peaks, and a fourth strength amplitude value of a water signal, a fourth strength amplitude value of a fat signal, a fourth field drift caused by a non-uniform main magnetic field, and the water-fat tissue temperature image at the current moment that minimize a difference between signal strength and signal strength before fitting are estimated.
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94.发明申请公开(公告)号：US20200256942A1
公开(公告)日：2020-08-13
申请号：US16760956
申请日：2017-12-01
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Shanshan WANG , Dong LIANG , Sha TAN , Xin LIU , Hairong ZHENG
IPC: G01R33/561 , G01R33/56 , G06T11/00
Abstract: Provided are a parallel magnetic resonance imaging method and apparatus based on adaptive joint sparse codes and a computer-readable medium. The method includes solving an l2−lF−l2,1 minimization objective, where the l2 norm is a data fitting term, the lF norm is a sparse representation error, and the l2,1 mixed norm is the joint sparsity constraining across multiple channels; separately updating each of a sparse matrix, a dictionary and K-space data with a corresponding algorithm, and obtaining a reconstructed image by a sum of root mean squares of all the channels. The joint sparsity of the channels is developed using the norm l2,1. In this manner, calibration is not required while information sparsity is developed. Moreover, the method is robust.
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95.发明申请公开(公告)号：US20200242758A1
公开(公告)日：2020-07-30
申请号：US16632579
申请日：2017-07-26
Applicant: Shenzhen Institutes of Advanced Technology
Inventor： Shoujun Zhou , Baochang Zhang , Baolin Li , Cheng Wang , Pei Lu
Abstract: The present invention is applicable to the technical field of medical image processing, and provides a method, an apparatus, a device, and a storage medium for extracting a cardiovascular vessel from a CTA image. The method comprises: performing erosion operation and dilation operation on image data successively via a preset structural element to obtain a structure mask; performing a slice-by-slice transformation on the plane of section images of the structural mask to acquire the first ascending aortic structure in the structural mask, and acquiring an aortic center position and an aortic radius in the last slice of the plane of section image of the said structural mask; establishing a binarized sphere structure according to the aortic center position and the aortic radius, and synthesizing a second ascending aorta structure by combining the first ascending aorta structure with the structure mask and the binarized sphere structure. The present invention realizes extracting shapes of ascending aorta and root aortic sinus, so that the aortic structure and morphology can be accurately visualized, thereby greatly improving the level and ability of medical imaging researches to solve clinical issues.
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Patent Agency Ranking
公开(公告)号：US20200147786A1
公开(公告)日：2020-05-14
申请号：US16610524
申请日：2017-06-09
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： GUORU ZHAO , YONGFENG WANG
IPC: B25J9/00
Abstract: A 2 DOFs decoupling parallel mechanism provided by the present disclosure comprises a fixed platform, a rotation assembly, a moving platform, an arc kinematic chain, and an arc rod. In the 2 DOFs decoupling parallel mechanism, the rotation assembly can drive the moving platform to rotate by 360 degrees around a direction being perpendicular to the fixed platform, the arc rod reciprocates along the tangential direction of the arc kinematic chain to enable the moving platform to rotate around an axis of a plane where the arc kinematic chain is located. In this way, the rotations of the moving platform in two directions are respectively driven by driving units in two directions and being independent from each other, such that the two rotation actions of the mechanism have decoupling capability.
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公开(公告)号：US10336615B2
公开(公告)日：2019-07-02
申请号：US15389666
申请日：2016-12-23
Applicant: Shenzhen Institutes of Advanced Technology
Inventor： Huaiyu Wang , Yuetao Zhao , Xuefeng Yu
IPC: C01B25/00 , A61K41/00 , H01L51/00 , C07F9/06 , C09K15/14 , C09K15/28 , C07C309/04 , C07C309/06 , C07C309/29 , C07C309/30 , C07C309/39 , C07C309/40 , C07C309/42 , C07C309/46 , H01L51/05 , H01L51/50
Abstract: The present invention provides a titanium ligand-modified black phosphorus and the preparation method and use thereof. The titanium ligand-modified black phosphorus is a complex of black phosphorus and a titanium ligand having a structure represented by formula (I): wherein in the formula (I), R1 comprises C1-C6 alkyl, or phenyl optionally further substituted with 0 to 5 groups each independently selected from halogen atom, C1-C6 alkyl, nitro, hydroxy, amino or C1-C3 alkoxy; the C1-C6 alkyl or C1-C3 alkoxy is optionally further substituted with 0 to 3 groups each independently selected from halogen atom, nitro, hydroxy, amino, methyl, ethyl or n-propyl. The titanium ligand-modified black phosphorus of the present invention is not likely oxidized without changing inherent properties of the black phosphorus, and the antioxidant capacity is greatly enhanced.
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98.发明申请公开(公告)号：US20190053786A1
公开(公告)日：2019-02-21
申请号：US16167060
申请日：2018-10-22
Applicant: Shenzhen Institutes of Advanced Technology
Inventor： Weibao QIU , Peitian MU , Hairong ZHENG
Abstract: A delayed excitation ultrasonic imaging method includes: generating a regulating clock, and performing, according to the regulating clock, delayed excitation on an ultrasonic transducer once or multiple times; performing data collection on an ultrasonic echo signal of the ultrasonic transducer and signals after each time of performing delayed excitation; synthesizing and superimposing data collected to obtain high sampling rate data; and performing ultrasonic imaging according to the high sampling rate data. A delayed excitation ultrasonic imaging apparatus and system are also provided. By performing delayed excitation on the ultrasonic transducer, the high-frequency ultrasonic imaging is realized by low-frequency sampling and delayed excitation, which can greatly reduce the cost of the ultrasonic imaging system.
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99.发明授权公开(公告)号：US10134143B2
公开(公告)日：2018-11-20
申请号：US15412838
申请日：2017-01-23
Applicant: Shenzhen Institutes of Advanced Technology
Inventor： Qingmao Hu , Tianqiao Zhang
Abstract: The present disclosure provides a method for acquiring a retina structure from an optical coherence tomographic image and a system thereof. The method comprises: calculating a region of interest (ROI) image of a source image; performing a Gaussian filtering of the ROI image; calculating a first estimated boundary position of a first layer boundary and a second estimated boundary position of a second layer boundary using a multi-resolution method; refining the first layer boundary and the second layer boundary respectively using a simplified active contour model according to the first estimated boundary position and the second estimated boundary position, to obtain a first initial boundary position of the first layer boundary and a second initial boundary position of the second layer boundary; smoothing the first initial boundary position and the second initial boundary position using a filtering method; acquiring segmentation positions of rest layer boundaries in the ROI image according to a segmented position of the first layer boundary and a segmented position of the second layer boundary. The present disclosure can improve the calculation speed and reduce the calculation complexity while maintaining high location accuracy.
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100.发明申请公开(公告)号：US20180132807A1
公开(公告)日：2018-05-17
申请号：US15850561
申请日：2017-12-21
Applicant: Shenzhen Institutes of Advanced Technology
Inventor： Xiaokun LIANG , Yaoqin XIE , Zhicheng ZHANG , Tianye NIU
Abstract: A method and apparatus for optimizing a blocking grating for cone beam CT image scattering correction, wherein the method comprises: scanning a blocking grating to establish a swinging model thereof; setting initial coordinates of the blocking grating along a longitudinal direction of a detector in an initial projection, and establishing an objective function between CBCT image data missing voxel values and the coordinates of the blocking grating along the longitudinal direction of the detector according to the swinging model; minimizing the objective function with a mesh-adaptive direct search algorithm to generate optimized coordinates of the blocking grating along the longitudinal direction of the detector. The present disclosure proposes a brand new scattering correction method not requiring any source compensation, performs a mathematical optimization modeling of the data missing caused by the blocking grating in the image domain, quantitatively evaluates the influence on the reconstructed image by a blocker, solves a geometric optimal structure of the blocker using a mesh-adaptive direct search algorithm, and lays a solid theory foundation for the scattering correction method based on the blocker measurement.
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