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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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公开(公告)号：US12092714B2
公开(公告)日：2024-09-17
申请号：US17992868
申请日：2022-11-22
Inventor： Hairong Zheng , Qiaoyan Chen , Ye Li , Chao Luo , Xin Liu
IPC: G01R33/3875 , A61B5/055
CPC classification number: G01R33/3875 , A61B5/055
Abstract: A shimming method and device, an electronic device, and a storage medium are disclosed. The shimming method includes: obtaining object static magnetic field distribution information corresponding to a target object, the object static magnetic field distribution information including the static magnetic field distribution information of the target object under the action of a main magnet of a magnetic resonance system; determining a target static magnetic field based on the object static magnetic field distribution information and a preset shim coil magnetic field distribution model; and adjusting at least one shim coil parameter in the shim coil magnetic field distribution model until a magnetic field uniformity of the target static magnetic field satisfies a preset condition, and accordingly obtaining at least one target shim coil parameter.
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公开(公告)号：US10746833B2
公开(公告)日：2020-08-18
申请号：US15986462
申请日：2018-05-22
Inventor： Lei Zhang , Yiu-Cho Chung , Xin Liu , Xiaoqing Hu , Hairong Zheng
IPC: G01R33/565 , G01R33/56 , A61B5/02 , G06T11/00 , G01R33/50 , A61B5/055 , A61B5/00 , G01R33/563 , A61B5/03
Abstract: A magnetic resonance vessel wall imaging method and device. The method comprises: applying a set pulse sequence into an imaging region, wherein the set pulse sequence comprises, in chronological order, a Delay Alternating with Nutation for Tailored Excitation (DANTE) pulse train, a variable flip angle train of a three-dimensional fast spin echo (SPACE), and a flip-down pulse train (S110); acquiring a magnetic resonance signal generated in the imaging region, and reconstructing a magnetic resonance images of the vessel wall in the imaging region according to the magnetic resonance signal (S120). By adding the flip-down pulse train behind the variable flip angle train of the three-dimensional fast spin echo (SPACE), the cerebrospinal fluid signals of the whole brain can be further suppressed effectively and uniformly, and the DANTE pulse train promotes the vessel wall imaging of the head and neck jointing portion.
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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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Patent Agency Ranking
公开(公告)号：US10018698B2
公开(公告)日：2018-07-10
申请号：US15103845
申请日：2014-12-05
Inventor： Xi Peng , Dong Liang , Xin Liu , Hairong Zheng
IPC: G01V3/00 , G01R33/561 , G01R33/56 , G01R33/50
CPC classification number: G01R33/561 , G01R33/50 , G01R33/5608 , G01R33/5611
Abstract: Disclosed is a magnetic resonance rapid parameter imaging method and system. The method comprises: obtaining a target undersampled magnetic resonance signal (S10); obtaining prior information of a parameter model (S20); performing sequence reconstruction of a target image according to the undersampled magnetic resonance signal and the prior information to obtain a target image sequence (S30); and substituting the target image sequence into the parameter estimation model to obtain object parameters and to generate parametric images (S40).
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公开(公告)号：US09606204B2
公开(公告)日：2017-03-28
申请号：US14364711
申请日：2012-11-14
Inventor： Bensheng Qiu , Yibiao Song , Yongqin Zhang , Hui Miao , Xin Liu , Hairong Zheng
IPC: G01V3/00 , G01R33/36 , G01R33/3415
CPC classification number: G01R33/3621 , G01R33/3415 , G01R33/3614 , G01R33/3628 , G01R33/3664
Abstract: A magnetic resonance multi-core array radio frequency device and a magnetic resonance signal receiving method are provided. The device comprises a radio frequency receiver which includes a radio frequency coil (11), a low noise preamplifier (13), a multiplexer (15), a radio frequency band-pass filter (17), a program control amplifier (19), a frequency synthesizer (21), a mixer (23), an analog to digital converter (29) and a controller (31). The controller (31) is used for controlling the multiplexer (15) to select a corresponding radio frequency coil channel, a corresponding filtering channel, gain of the radio frequency band-pass filter (17), and receiving a magnetic resonance digital signal transmitted by the analog to digital converter (29). Due to the multiplexer (15), there is no need to configure different circuits respectively for different nuclear magnetic resonance, redundancy of the circuits is reduced, and cost is reduced.
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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：US20160047873A1
公开(公告)日：2016-02-18
申请号：US14781297
申请日：2013-03-29
Inventor： Yiu-cho Chung , Yanjie Zhu , Xin Liu , Hairong Zheng
IPC: G01R33/561 , G01R33/56
CPC classification number: G01R33/5614 , G01R33/5602 , G01R33/5608
Abstract: A fast magnetic resonance imaging method and system, the method comprising: applying a periodic radio-frequency pulse train to drive the magnetization vector of an imaging volume into a steady state (102); acquiring a free induction decay (FID) signal and an echo signal alternately in a steady-state free precession sequence (104); conducting an FID signal imaging and a T2-weighted imaging (106). Alternate acquisition of the FID signal and the echo signal in the steady-state free precession sequence effectively increases the signal-to-noise ratio (SNR) of the acquired signals and reduces the sensitivity of the sequence to motions.
Abstract translation: 一种快速磁共振成像方法和系统，所述方法包括：应用周期性射频脉冲串将成像体积的磁化矢量驱动到稳定状态（102）; 在稳态自由进动序列（104）中交替地获取自由感应衰减（FID）信号和回波信号; 进行FID信号成像和T2加权成像（106）。 FID信号和稳态自由进动序列中的回波信号的交替采集有效地增加了获取的信号的信噪比（SNR），并降低了序列对运动的灵敏度。
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公开(公告)号：US12153175B2
公开(公告)日：2024-11-26
申请号：US17824453
申请日：2022-05-25
Inventor： Zhanli Hu , Yongfeng Yang , Chunhui Zhang , Zhonghua Kuang , Xiaohui Wang , San Wu , Dong Liang , Xin Liu , Hairong Zheng
Abstract: A method for processing positron emission tomography data is provided, this method includes: obtaining a first coordinate and a second coordinate respectively corresponding to two ends of a response line to be processed; determining corresponding dimensional coordinates of the response line to be processed in a sinogram based on the first coordinate and the second coordinate; and generating the sinogram corresponding to the response line to be processed based on the dimensional coordinates. According to this method, the amount of calculation of system matrix is reduced, the accuracy of position information of the generated response line is improved, and the accuracy of generated sinogram is improved accordingly.
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