Method and apparatus for reconstruction of non-uniformly sampled data

US6975751B2 · kind B2 · utility

Assignees

• The Board of Trustees of the Leland Stanford Junior University · US
• GE Medical Systems Global Technology Company, LLC · US

Inventors

• John M. Pauly · Stanford, US
• Juan Santos · Los Altos, US
• Graham Wright · Toronto, CA

Key dates

• Filing date: May 17, 2002
• Grant date: Dec 13, 2005
• Expiry date: Feb 14, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56545
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for reconstructing non-uniformly sampled data to create an image includes: receiving a new partial data set, the new partial data set including a vector of non-uniformly sampled data at k-space positions; subtracting an old partial data set at the same k-space positions from the new partial data set to create a difference vector; gridding the difference vector to create a difference matrix; adding the difference matrix to a frame of previously gridded data to create a new frame; and transforming the new frame to create the image. In one embodiment, gridding includes constructing a gridding table for a data point in a complete data set, and convolving a data point in the difference vector with the gridding table. In another embodiment at least one of a grid size and a first parameter of the window function is optimized using input parameters for at least one of aliasing energy and computation time.