Method, system and computer product for k-space correction of gradient non-linearities

US7019524B2 · kind B2 · utility

Assignee

• GE Medical Systems Global Technology Company, LLC · US

Inventors

• David H. Gurr · Milwaukee, US
• Jean H. Brittain · Pewaukee, US
• John M. Pauly · Stanford, US

Key dates

• Filing date: May 17, 2002
• Grant date: Mar 28, 2006
• Expiry date: Jan 25, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56518
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

One aspect of the invention is a method for reconstructing a moving table MR image. The method comprises receiving an input array that includes a plurality of uncorrected k-space data points. The method further comprises clearing a summation array. For uncorrected k-space data points in the input array the following steps are performed. A kernel associated with the k-space data point is obtained. Corrected data is created in response to the k-space data point, the input array and the kernel. Creating the corrected data includes correcting the uncorrected k-space data point for gradient non-linearities, where the correction is performed in k-space, and correcting the uncorrected k-space data point for table movement. The corrected data is added into the summation array. The image is reconstructed in response to the data in the summation array.