Partially parallel magnetic resonance imaging using arbitrary k-space trajectories with image reconstruction based on successive convolution operations
AssigneeUniversity of Virginia Patent Foundation
InventorsPeng Hu, Craig H. Meyer
Life of this patent
Estimating the term…
Abstract
In a first step of image formation by MRI or the like, a gridding convolution is performed for each coil using a Kaiser-Bessel kernel, so that each coil channel now contains data on grid points. In the second step, another 2D convolution is performed on each of the gridded coil data sets in either k-space or image space, and all the convolutions are summed up to produce the composite k-space data set for the target coil. In the third step, the composite data set is then transformed to form an un-aliased image for that coil. In the fourth step, the un-aliased images for all the coils are combined using square-root-of-sum-of-squares to form the final reconstructed image.
Claims72
A method for forming an image of an object, the method comprising:
- (a) taking a plurality of sets of non-Cartesian image data of the object, using non-Cartesian imaging trajectories;
- (b) performing a gridding convolution on each of the plurality of sets of non-Cartesian image data to convert said each of the plurality of sets of raw image data into a set of gridded image data;
- and
- (c) forming the image, using the sets of gridded image data formed in step (b).
A system for forming an image of an object, the system comprising:
- a plurality of imaging devices for taking a plurality of sets of non-Cartesian image data of the object, using non-Cartesian imaging trajectories;
- a processing device, in communication with the imaging devices, for performing a gridding convolution on each of the plurality of sets of non-Cartesian image data to convert said each of the plurality of sets of raw image data into a set of gridded image data and for forming the image, using the sets of gridded image data;
- and
- an output device for outputting the image.
A method for forming an image of an object, the method comprising:
- (a) taking a plurality of sets of Cartesian image data of the object, using Cartesian imaging trajectories;
- (b) forming the image, using the sets of image data formed in step (a).
A system for forming an image of an object, the system comprising:
- a plurality of imaging devices for taking a plurality of sets of Cartesian image data of the object, using Cartesian imaging trajectories;
- a processing device, in communication with the imaging devices, for forming the image, using the sets of Cartesian image data;
- and
- an output device for outputting the image.
Dependencies are inferred from the claim text.