System and method for imaging a moving subject
AssigneeGeneral Electric Company
InventorPeng Lai
Life of this patent
Estimating the term…
Abstract
An MRI system for imaging a moving subject is provided. The MRI system includes a magnet assembly and an MRI controller. The magnet assembly is configured to acquire a k-space via scanning the subject. The acquired k-space includes a plurality of datum each having a motion error. The MRI controller is configured to receive the acquired k-space from the magnet assembly. The MRI controller is further configured to suppress the motion error of each datum by reconstructing the k-space via a soft gating threshold in a non-iterative manner.
Claims15
A magnetic resonance imaging (“MRI”) system for imaging a moving subject, the MRI system comprising:
- a magnet assembly configured to acquire a k-space via scanning the moving subject, the acquired k-space including a plurality of datum each having a motion error;
- an MRI controller configured to:
- receive the acquired k-space from the magnet assembly;
- synthesize unacquired k-space based on the acquired k-space via a soft gating threshold in a non-iterative manner, each datum in the unacquired k-space being synthesized from neighboring acquired k-space datum;
- and
- reconstruct an image from the acquired k-space and the synthesized unacquired k-space.
A method for magnetic resonance imaging (“MRI”) a moving subject, the method comprising:
- acquiring a k-space via scanning the moving subject with a MRI system, the k-space including a plurality of datum each having a motion error;
- calculating coil weights;
- synthesizing unacquired k-space based on the acquired k-space in a non-iterative manner based on the coil weights, each datum in the unacquired k-space being synthesized from neighboring acquired k-space datum;
- and
- reconstructing an image from the acquired k-space and the synthesized unacquired k-space;
- wherein the coil weight for a particular datum of the acquired k-space decreases as the motion error of the particular datum increases.
A magnetic resonance imaging (“MRI”) controller for a MRI system that images a moving subject, the MRI controller configured to:
- direct a magnet assembly of the MRI system to acquire a k-space via scanning the moving subject, the acquired k-space including a plurality of datum each having a motion error;
- estimate a soft gating filter;
- construct a motion regularization matrix based at least in part on the estimated soft-gating filter;
- calculate coil weights based at least in part on the constructed motion regularization matrix;
- synthesize unacquired k-space based on the acquired k-space in a non-iterative manner based on the coil weights, each datum in the unacquired k-space being synthesized from neighboring acquired k-space datum;
- and
- reconstruct an image from the acquired k-space and synthesized unacquired k-space.
Dependencies are inferred from the claim text.