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：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：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

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

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).