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公开(公告)号：US10782379B2
公开(公告)日：2020-09-22
申请号：US16645798
申请日：2015-12-30
Inventor： Hairong Zheng , Xin Liu , Chuanli Cheng , Chao Zou
IPC: G01R33/565 , A61B5/055
Abstract: A method, an apparatus, and a device for magnetic resonance chemical shift encoding imaging are provided. The method includes in a phasor-error spectrum established based on a simplified multi-point magnetic resonance signal model, determining a pixel point having a unique phase factor value and causing the phasor-error spectrum to reach a local minimum value as an initial seed point; estimating a phase factor value of a pixel point to be estimated according to the initial seed point to obtain a field map; mapping and merging the field maps at the highest resolution to obtain a reconstructed field map; determining a reconstructed seed point from the reconstructed field map, and estimating the reconstructed seed point to obtain a phase factor value of a reconstructed pixel point to be estimated.
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公开(公告)号：US20190011515A1
公开(公告)日：2019-01-10
申请号：US16067204
申请日：2015-12-30
Inventor： Hairong Zheng , Xin Liu , Chuanli Cheng , Chao Zou
IPC: G01R33/48 , G01R33/565 , G01R33/485 , G01R33/46 , A61B5/055 , G01R33/44 , G01R33/56
Abstract: Provided are a magnetic resonance chemical-shift-encoded imaging method, apparatus, and device, belonging to the technical field of magnetic resonance imaging. The method comprises: in a phasor-error plot established on the basis of a two-point magnetic resonance signal model, determining to be an initial seed point a pixel having a unique phasor and causing said plot to reach a minimal local value; according to the initial seed point, estimating the phasor value of a to-be-estimated pixel to obtain a field map; mapping and merging the field map at the highest resolution to obtain a reconstructed field map; determining a reconstructed seed point from the reconstructed field map, and estimating the reconstructed seed point to obtain the phasor value of the reconstructed to-be-estimated pixel; according to the reconstructed seed point and the phasor value of the reconstructed to-be-estimated pixel, obtaining two separate images having predetermined components. In the method, a region simultaneously containing two components is identified as a seed point, eliminating the deviation caused by phasor-value jump at high resolution and ensuring the correctness of the seed point ultimately selected.
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3.发明授权公开(公告)号：US11249163B2
公开(公告)日：2022-02-15
申请号：US16977818
申请日：2017-11-27
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Chao Zou , Chuanli Cheng , Xin Liu , Hairong Zheng
IPC: G01R33/565 , G01R33/561 , G01R33/56 , G01R33/48
Abstract: An eddy-current correction method and apparatus, a mobile terminal and a readable storage medium are provided. The method includes: step S1: reading gradient-recalled echo sequence by means of bipolarity, so as to acquire a multi-echo image; step S2: estimating a first-order term coefficient of an extra phase term introduced by an eddy-current in the acquired multi-echo image; step S3: removing the estimated first-order term coefficient, and estimating a zero-order term coefficient of the extra phase term introduced by the eddy-current in the collected multi-echo image; step S4: removing, according to the estimated first-order term coefficient and the zero-order term coefficient, an error of the extra phase term introduced by the eddy-current. The eddy-current correction method removes the phase error caused by the eddy-current in the acquired image, thereby ensuring the correctness of the subsequent water-fat separation algorithm result.
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公开(公告)号：US10969449B2
公开(公告)日：2021-04-06
申请号：US16261610
申请日：2019-01-30
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Ye Li , Qiaoyan Chen , Jo Lee , Chao Luo , Jianhong Wen , Chao Zou , Xin Liu
Abstract: A local shimming system for magnetic resonance imaging and the method thereof, wherein the shimming method comprises the following steps: collecting B0 field map information using two-dimensional gradient echo (301); calculating and evaluating the homogeneity of B0 (302); optimizing the current of each channel shim coil (303); determining whether the minimum standard deviation value of Δf is obtained (304); outputting an optimal current combination values and setting an optimum current value corresponding to each channel of the shim coil on the current control software (305); and testing and evaluating the homogeneity of B0 to achieve the shimming goal (306).
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Patent Agency Ranking
公开(公告)号：US11378636B2
公开(公告)日：2022-07-05
申请号：US17032588
申请日：2020-09-25
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Ye Li , Qiaoyan Chen , Jo Lee , Chao Luo , Jianhong Wen , Chao Zou , Xin Liu
Abstract: A shimming system for magnetic resonance imaging is provided, which includes: a multi-channel local shim coil unit configured to be installed on an inspection table of a magnetic resonance imaging system, where the multi-channel local shim coil unit includes a local multi-channel shim coil and a radio frequency receiving coil for receiving magnetic resonance signals, and the radio frequency receiving coil is placed inside the local multi-channel shim coil and separated by a distance from the local multi-channel shim coil; a computer control system configured to install and set software controlled by a DC power and calculate field maps and calculate optimization processes; a DC power system communicatively connected to the computer control system to control a value of current of each channel; and a housing having a semi-cylindrical configuration, where the local multi-channel shim coil is only distributed on a semi-cylindrical surface of the semi-cylindrical configuration of the housing.
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公开(公告)号：US10459052B2
公开(公告)日：2019-10-29
申请号：US16067204
申请日：2015-12-30
Inventor： Hairong Zheng , Xin Liu , Chuanli Cheng , Chao Zou
IPC: G01R33/56 , G01R33/48 , A61B5/055 , G01R33/44 , G01R33/46 , G01R33/485 , G01R33/565
Abstract: Provided are a magnetic resonance chemical-shift-encoded imaging method, apparatus, and device, belonging to the technical field of magnetic resonance imaging. The method comprises: in a phasor-error plot established on the basis of a two-point magnetic resonance signal model, determining to be an initial seed point a pixel having a unique phasor and causing said plot to reach a minimal local value; according to the initial seed point, estimating the phasor value of a to-be-estimated pixel to obtain a field map; mapping and merging the field map at the highest resolution to obtain a reconstructed field map; determining a reconstructed seed point from the reconstructed field map, and estimating the reconstructed seed point to obtain the phasor value of the reconstructed to-be-estimated pixel; according to the reconstructed seed point and the phasor value of the reconstructed to-be-estimated pixel, obtaining two separate images having predetermined components. In the method, a region simultaneously containing two components is identified as a seed point, eliminating the deviation caused by phasor-value jump at high resolution and ensuring the correctness of the seed point ultimately selected.
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公开(公告)号：US20250031975A1
公开(公告)日：2025-01-30
申请号：US18836155
申请日：2022-01-19
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Lijuan Zhang , Chao Zou , Siqi Cai , Shihui Zhou , Yang Zhou , Hairong Zheng , Xin Liu
Abstract: A temperature measuring method and apparatus based on creatine chemical exchange saturation transfer (CEST) imaging. The method comprises the following steps: (1) performing creatine CEST imaging on a creatine phantom, and analyzing a chemical shift of creatine relative to water in the creatine phantom; (2) fitting a mathematical relation between the chemical shift of the creatine relative to water and the temperature; and (3) performing CEST imaging on creatine in a sample, and calculating the temperature according to the mathematical relation, fitted in step (2), between the chemical shift of the creatine relative to water and the temperature. In the temperature measuring method, the creatine is taken as an endogenous reference, and highly-spatial-resolution, highly-sensitive, and non-invasive absolute temperature measurement can be implemented by means of temperature dependence of a CEST effect of Cr and water.
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8.发明授权公开(公告)号：US11699513B2
公开(公告)日：2023-07-11
申请号：US16626661
申请日：2018-12-29
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES , SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
Inventor： Dong Liang , Chao Zou , Qiang He , Guobin Li , Qiang Zhang , Xin Liu , Hairong Zheng
CPC classification number: G16H30/20 , G06F21/31 , G16H40/60 , G06F3/1204
Abstract: Disclosed are information transmission method, apparatus, device and medium for medical imaging application. The method includes: an imaging device corresponding to an application authorization request is determined according to the received application authorization request, and an application permission profile of the imaging device is acquired; and a medical imaging application corresponding to the imaging device is determined according to the application permission profile of the imaging device, and medical imaging application information corresponding to the medical imaging application is transmitted to the imaging device.
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公开(公告)号：US20190195972A1
公开(公告)日：2019-06-27
申请号：US16261610
申请日：2019-01-30
Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Inventor： Ye Li , Qiaoyan Chen , Rou Li , Chao Luo , Jianhong Wen , Chao Zou , Xin Liu
CPC classification number: G01R33/3875 , A61B5/055 , A61B17/320068 , A61B2017/320069 , G01R33/443 , G01R33/4814 , G01R33/543
Abstract: A local shimming system for magnetic resonance imaging and the method thereof, wherein the shimming method comprises the following steps: collecting B0 field map information using two-dimensional gradient echo (301); calculating and evaluating the homogeneity of B0 (302); optimizing the current of each channel shim coil (303); determining whether the minimum standard deviation value of Δf is obtained (304); outputting an optimal current combination values and setting an optimum current value corresponding to each channel of the shim coil on the current control software (305); and testing and evaluating the homogeneity of B0 to achieve the shimming goal (306).
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