公开(公告)号：US12092714B2

公开(公告)日：2024-09-17

申请号：US17992868

申请日：2022-11-22

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

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.

公开(公告)号：US20230204697A1

公开(公告)日：2023-06-29

申请号：US17921465

申请日：2020-07-23

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Ye Li ,  Feng DU ,  Nan Li ,  Xing Yang ,  Qiaoyan Chen ,  Xin Liu ,  Hairong Zheng

IPC: G01R33/36 ,  G01R33/3415

CPC classification number: G01R33/3635 ,  G01R33/3415

Abstract: Provided is a quad-core radio-frequency coil circuit. The quad-core radio-frequency coil circuit includes a coil module (1) and a front-end module (2). The coil module (1) is configured to receive a nuclear magnetic test signal and, according to the nuclear magnetic test signal, generate an induction signal. The front-end module (2) is connected to the coil module (1) and configured to generate the nuclear magnetic test signal and collect the induction signal.

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

IPC: G01R33/3875 ,  G01R33/44 ,  G01R33/54 ,  A61B5/055 ,  G01R33/48 ,  A61B17/32 ,  G01R33/24

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.

公开(公告)号：US11210783B2

公开(公告)日：2021-12-28

申请号：US16910074

申请日：2020-06-24

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Hairong Zheng ,  Xin Liu ,  Na Zhang ,  Zhanli Hu ,  Dong Liang ,  Yongfeng Yang

IPC: G06K9/00 ,  G06T7/00 ,  G16H30/40 ,  G06K9/62 ,  G06N3/08 ,  G06T11/00

Abstract: A method of processing plaques in magnetic resonance imaging of vessel wall include: step S101, training a generative adversarial network and a capsule neural network to obtain a trained generator network and a trained capsule neural network; and step S102, cascade-connecting the trained generator network with the capsule neural network into a system to recognize and classify plaques in magnetic resonance imaging of vessel wall. In one aspect, the capsule neural network has more abundant vascular plaques characteristic information represented by vector; in another aspect, when the trained generator network and the capsule neural network are cascaded into the system to recognize and classify the plaques in magnetic resonance imaging of vessel wall, an accuracy of recognition and classification may be greatly improved. A device for processing the method as well as a computer for implementing are also disclosed.

公开(公告)号：US10884080B2

公开(公告)日：2021-01-05

申请号：US16348917

申请日：2018-10-26

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Hairong Zheng ,  Ye Li ,  Qiaoyan Chen ,  Feng Du ,  Nan Li ,  Jo Lee ,  Chao Luo ,  Qiang He ,  Xin Liu

IPC: G01R33/34 ,  G01R33/36

Abstract: A dual-nuclear radio frequency (RF) coil device includes a first RF coil and a second RF coil. The first RF coil includes at least one adjustment capacitor, the first RF coil is configured to generate a first magnetic field, and a direction of a primary magnetic field of the first magnetic field is a first direction. The second RF coil includes an electric dipole and a tuning and matching circuit connected between two conductors of the electric dipole. The second RF coil is configured to generate a second magnetic field and a direction of a primary magnetic field of the second magnetic field is a second direction; the electric dipole is disposed in a center line of the first RF coil and an insulating layer is disposed between the electric dipole and the first RF coil; and the first direction is perpendicular to the second direction.

公开(公告)号：US10746833B2

公开(公告)日：2020-08-18

申请号：US15986462

申请日：2018-05-22

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

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.

公开(公告)号：US10459052B2

公开(公告)日：2019-10-29

申请号：US16067204

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: G01R33/56 ,  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.

公开(公告)号：US10018698B2

公开(公告)日：2018-07-10

申请号：US15103845

申请日：2014-12-05

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

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).

公开(公告)号：US09606204B2

公开(公告)日：2017-03-28

申请号：US14364711

申请日：2012-11-14

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

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.

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

IPC: A61B5/01 ,  G01K11/00

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.