Highly constrained magnetic resonance spectroscopy image reconstruction method
AssigneeWisconsin Alumni Research Foundation
InventorsCharles Mistretta, Scott Reeder, John Perry, Oliver Wieben
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Abstract
A series of image frames are acquired in which an MR parameter such as echo time (TE) is changed and the resulting image frames are employed to produce an MRS image of a metabolite. Scan time is reduced without sacrificing image quality by reconstructing a composite image from data acquired for a plurality of the image frames and using a highly constrained image reconstruction method with the composite image to produce each image frame.
Claims11
A method for producing an image of a subject positioned in the field of view (FOV) of a magnetic resonance imaging (MRI) system, the steps comprising:
- a) acquiring with the MRI system a set of projection views of the subject using a pulse sequence having a set of MR parameters;
- b) changing an MR parameter in the pulse sequence and repeating step a) to acquire an additional set of projection views, wherein the acquired projection views are interleaved;
- c) reconstructing a composite image that indicates a value at each composite image pixel using projection views from a plurality of said sets of projection views;
- d) reconstructing image frames from corresponding sets of projection views, each image frame being reconstructed by:
- d)i) backprojecting each projection view in the corresponding set of projection views and weighting the value backprojected into each image frame pixel by the value of the corresponding pixel in the composite image;
- and
- d)ii) summing the backprojected values for each image frame pixel;
- and
- e) processing the reconstructed image frames to produce an image.
Dependencies are inferred from the claim text.