Fast automatic linear off-resonance correction method for spiral imaging

✍ Scribed by Weitian Chen; Craig H. Meyer

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 260 KB
• Volume: 56
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.20973

✦ Synopsis

Abstract

Field inhomogeneity and susceptibility variations, coupled with a long readout, can result in image blurring in spiral imaging. Many correction methods based on a priori off‐resonance information, such as an acquired field map, have been proposed in the literature. Automatic off‐resonance correction methods are alternative approaches that estimate a field map from the image data themselves. In this paper we propose a fast automatic off‐resonance correction method that performs linear correction without acquiring a field map. The method requires only about two times the total computation time compared to image reconstruction by gridding. It can also be used in combination with a full field map automatic off‐resonance correction method to increase the extent of correction. The method is demonstrated by in vivo coronary artery imaging. Magn Reson Med, 2006. © 2006 Wiley‐Liss, Inc.