Method and device for correcting a shimming device
AssigneeSiemens Aktiengesellschaft
InventorsRui Bin Dai, Qiang He, Xiao Cong Xing
Life of this patent
Estimating the term…
Abstract
Disclosed in the present embodiments are a method and a device for correcting a shimming device. A phase image in a coronal plane direction of a phantom is used to make an estimation of a degree of symmetry of the phase image for each test position of the shimming device. From the image symmetry estimation result corresponding to each test position, a test position with the best image symmetry estimation result is selected to be an optimum deployment point of the shimming device.
Claims19
A method for correcting a shimming device, the method comprising:
- acquiring a phase image in a coronal plane direction of a phantom for each test position of the shimming device;
- extracting an internal contour line in the phase image;
- mapping the internal contour line onto a rectangular coordinate system or a polar coordinate system to obtain a corresponding characteristic curve;
- estimating a degree of symmetry of the characteristic curve, such that an image symmetry estimation for the test position is obtained;
- and
- selecting the test position with an optimized image symmetry estimation as an optimum deployment point of the shimming device.
A device for correcting a shimming device, the device comprising:
- a test position symmetry estimation unit configured for acquiring a phase image in a coronal plane direction of a phantom for each test position of the shimming device, the test position symmetry estimation unit configured for extracting an internal contour line in the phase image, mapping the internal contour line onto a rectangular coordinate system or a polar coordinate system to obtain a corresponding characteristic curve, and estimating a degree of symmetry of the characteristic curve, such that an image symmetry estimation is obtained at the test position;
- and
- an optimum deployment point determination unit configured for selecting the test position with the best image symmetry estimation result as the optimum deployment point of the shimming device.
Dependencies are inferred from the claim text.