Magnetic resonance imaging system, and main magnetic field correction method therefor and storage medium
AssigneeGE Precision Healthcare LLC
InventorsQilin Lu, Xihui Ju, Tao Wang, Kun Wang
Life of this patent
Estimating the term…
Abstract
A main magnetic field correction method for a magnetic resonance imaging system includes: obtaining an estimated image of a phantom based on a first imaging sequence, the first imaging sequence having a variable resonant frequency; pre-correcting a main magnetic field based on the estimated image; obtaining a scanned image of the phantom based on the pre-corrected main magnetic field; and determining whether the quality of the scanned image is within an acceptable range, and if not, returning to the step of obtaining the estimated image.
Claims11
A main magnetic field correction method for a magnetic resonance imaging system, comprising:
- obtaining an estimated image of a phantom based on a first imaging sequence, the first imaging sequence having a variable resonant frequency;
- pre-correcting a main magnetic field based on the estimated image;
- obtaining a scanned image of the phantom based on the pre-corrected main magnetic field;
- and
- determining whether the quality of the scanned image is within an acceptable range, and if not, returning to the step of obtaining the estimated image.
A main magnetic field correction method for a magnetic resonance imaging system, comprising:
- performing a first imaging sequence having a variable resonant frequency on a phantom to obtain a set of images of the phantom, and synthesizing the set of images to generate an estimated image of the phantom;
- pre-correcting a main magnetic field based on the estimated image;
- scanning the phantom based on the pre-corrected main magnetic field to obtain a scanned image;
- determining whether a deformation degree of the phantom in the scanned image is lower than a preset threshold;
- and
- if not, adjusting a plurality of resonant frequencies of the first imaging sequence and returning to the step of performing the first imaging sequence on the phantom, and if so, performing accurate shimming on the pre-corrected main magnetic field.
Dependencies are inferred from the claim text.