Accelerated magnetic resonance imaging using a parallel spatial filter
AssigneeThe United States of America as represented by the Department of Health and Human Services
InventorsPeter Kellman, Elliot McVeigh
Life of this patent
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Abstract
An apparatus and method for accelerating magnetic resonance imaging by decreasing the number of sequential phase encodes (undersampling). Image reconstruction of undersampled k-space data can cause ghost artifacts to be produced in the resulting sequence of images. A combination of temporal and spatial filters are used to substantially suppress the ghost artifacts. Additionally, the spatial filter receives spatial filter coefficients used in the filtering process. The spatial filter coefficients are adaptively or dynamically generated so that the coefficients are provided to the spatial filter while generating the sequence of images.
Claims19
A method for acceleration of magnetic resonance imaging to produce a series of images, comprising:
- acquiring undersampled data in a magnetic resonance imaging environment;
- and
- filtering the undersampled data using a series combination of a temporal filter and a spatial filter to produce the series of images with suppressed artifacts.
A method for acceleration of magnetic resonance imaging to produce a series of images, comprising:
- acquiring undersampled data from multiple coils in a magnetic resonance imaging environment;
- filtering the undersampled data using a spatial filter to suppress artifacts;
- and
- dynamically computing spatial filter coefficients and applying the dynamically computed spatial filter coefficients to the spatial filter while generating the series of images;
- wherein the undersampled data is k-space data and a phase encode ordering used for undersampling the k-space data is time varying, and multiple coils are used to acquire the k-space data.
A system for acceleration of magnetic resonance imaging to produce a series of images, comprising:
- multiple coils placed near a target to be imaged that receive k-space data representative of the target in the frequency domain;
- an image reconstructor that receives the k-space data and converts the k-space data to the image domain;
- and
- a spatial filter and a temporal filter coupled together in series and coupled in series to the image reconstructor, the spatial and temporal filters combining to suppress ghost artifacts caused by undersampling and to generate an output series of images.
Dependencies are inferred from the claim text.