公开(公告)号：US20210396829A1

公开(公告)日：2021-12-23

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 ,  G01R33/48 ,  G01R33/56 ,  G01R33/561

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.

公开(公告)号：US20210335479A1

公开(公告)日：2021-10-28

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

IPC: G16H30/20 ,  G16H40/60 ,  G06F21/31

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.

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

IPC: G01R33/48 ,  G01R33/50

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.

公开(公告)号：US20250148746A1

公开(公告)日：2025-05-08

申请号：US19019221

申请日：2025-01-13

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

Inventor： Hao PENG ,  Chao ZOU ,  Chuanli CHENG ,  Xin LIU ,  Hairong ZHENG

IPC: G06V10/25 ,  G06V10/26 ,  G06V10/36

Abstract: The present disclosure discloses a chemical shift coded imaging method based on a transition region and regional iterative phasor extraction. Acquiring an initial image, and determining an initial phasor solution of the transition region based on the initial image; performing regional iterative phasor extraction in at least two set directions by taking the initial phasor solution as initial information, and obtaining a target phasor solution based on a regional iterative phasor extraction result corresponding to each set direction; and determining a first chemical composition signal and a second chemical composition signal based on the target phasor solution, and performing chemical shift coded imaging based on the first chemical composition signal and/or the second chemical composition signal. By means of regional iterative phasor extraction in a plurality of dimensions, wrong phasor information is transferred independently along different dimensions, wrong information transferred in different directions is excluded.

公开(公告)号：US20200241099A1

公开(公告)日：2020-07-30

申请号：US16645798

申请日：2015-12-30

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

Inventor： Hairong ZHENG ,  Xin LIU ,  Chuanli CHENG ,  Chao ZOU

IPC: G01R33/565

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.

公开(公告)号：US20210088611A1

公开(公告)日：2021-03-25

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

IPC: G01R33/3875 ,  G01R33/44 ,  G01R33/54 ,  A61B5/055 ,  G01R33/48

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).