US 2019/0195972 A1 · LOCAL SHIMMING SYSTEM FOR MAGNETIC RESONANCE IMAGING AND METHOD THEREOF

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).

Claims10

Dependent claims

A shimming method for magnetic resonance imaging, comprising:

collecting B0 field map information using two-dimensional gradient echo;
calculating and evaluating a homogeneity of B0;
optimizing a current of each channel shim coil;
determining whether a minimum standard deviation value of Δf is obtained;
outputting an optimal current combination value and setting an optimum current value corresponding to each channel shim coil on a current control software;
and
testing and evaluating the homogeneity of B0 to achieve a shimming goal.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/261,610Filed 30 Jan 2019

Priority

25 Dec 2017

Published

27 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G01R 33/3875
Compensation of inhomogeneities: using correction coil assemblies, e.g. active shimming
A61B 5/055
Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves:…
G01R 33/443
Using nuclear magnetic resonance [NMR]: assessment of an electric or a magnetic field, e.g. spatial mapping, determination of a B0 drift or dosimetry
G01R 33/4814
Multimodal MR, e.g. MR combined with positron emission tomography [PET], MR combined with ultrasound or MR combined with computed tomography [CT]:…

Local shimming system for magnetic resonance imaging and method thereof

Life of this patent

Local shimming system for magnetic resonance imaging and method thereof

Life of this patent

Abstract

Claims10