公开(公告)号：US11756191B2

公开(公告)日：2023-09-12

申请号：US16979535

申请日：2018-12-13

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Shanshan Wang ,  Taohui Xiao ,  Hairong Zheng ,  Xin Liu ,  Dong Liang

IPC: G06T7/00 ,  A61B5/00 ,  A61B5/055 ,  G06T11/00 ,  A61B5/02

CPC classification number: G06T7/0012 ,  A61B5/004 ,  A61B5/055 ,  A61B5/7257 ,  A61B5/7267 ,  G06T11/005 ,  A61B5/02007 ,  A61B2576/02 ,  G06T2207/10064 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/30101 ,  G06T2210/36 ,  G06T2210/41

Abstract: A method for magnetic resonance imaging and plaque recognition includes: obtaining magnetic resonance undersampled K-space data; transforming the magnetic resonance undersampled K-space data to an image domain through inverse Fourier transform to obtain a preprocessed image; reconstructing the preprocessed image through a pre-established deep learning reconstruction model to obtain a high-resolution imaging image of a blood vessel wall; and recognizing plaques in the high-resolution imaging image of the blood vessel wall through a pre-established deep learning plaque recognition model. A neural network corresponding to the pre-established deep learning reconstruction model is a dense connection network. The magnetic resonance undersampled K-space data is head-and-neck combined magnetic resonance undersampled K-space data of the blood vessel wall.

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.

公开(公告)号：US20210366168A1

公开(公告)日：2021-11-25

申请号：US17287040

申请日：2019-01-15

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

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

IPC: G06T11/00 ,  G06T5/00 ,  G06T7/11 ,  A61B6/03

Abstract: The present invention discloses a PET image reconstruction method, a computer storage medium, and a computer device. The method includes: step 1, obtaining projection data Y and a system matrix P of a PET image; step 2, constructing an imaging model equation Y=PX, in which X is a reconstructed PET image; step 3, obtaining the initial reconstructed image X, and iteratively updating the initial reconstructed image X according to a first objective function to obtain a first reconstructed image; step 4, iteratively updating the first reconstructed image according to the second objective function to obtain the second reconstructed image; and step 5, determining whether an iteration condition is satisfied, if yes, outputting the current round of iteration to obtain the second reconstructed image as a final PET reconstructed image, and if not, returning to step 3 and using the second reconstructed image in the current round of iteration as an initial reconstructed image in the next round of iteration. The reconstruction algorithm of the present invention does not depend on a conformity degree between anatomical structure information and functional information, and can distinguish image edges well regardless of whether there is noise interfering with the image edges.

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

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

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).

公开(公告)号：US20200300946A1

公开(公告)日：2020-09-24

申请号：US16348917

申请日：2018-10-26

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Hairong Zheng ,  Li Ye ,  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：US20140361775A1

公开(公告)日：2014-12-11

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: G01R33/36

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.

Abstract translation: 提供一种磁共振多芯阵列射频装置和磁共振信号接收方法。 该装置包括一个射频接收机，它包括射频线圈（11），低噪声前置放大器（13），多路复用器（15），射频带通滤波器（17），程序控制放大器（19） 频率合成器（21），混频器（23），模数转换器（29）和控制器（31）。 控制器（31）用于控制多路复用器（15），以选择对应的射频线圈通道，对应的滤波通道，射频带通滤波器（17）的增益，以及接收由 模数转换器（29）。 由于多路复用器（15），不需要为不同的核磁共振分别配置不同的电路，减少了电路的冗余，降低了成本。