Average field map image template for Echo-Planar image analysis

Ali Gholipour; Nasser Kehtarnavaz; Kaundinya Gopinath; Richard Briggs; Issa Panahi

doi:10.1109/IEMBS.2008.4649099

Average field map image template for Echo-Planar image analysis

Annu Int Conf IEEE Eng Med Biol Soc. 2008:2008:94-7. doi: 10.1109/IEMBS.2008.4649099.

Authors

Ali Gholipour¹, Nasser Kehtarnavaz, Kaundinya Gopinath, Richard Briggs, Issa Panahi

Affiliation

¹ Electrical Engineering Department, University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080, USA. bag032000@utdallas.edu

PMID: 19162602
DOI: 10.1109/IEMBS.2008.4649099

Abstract

Magnetic resonance field map images are normally used in characterizing the magnetic field inhomogeneity for distortion correction in Echo-Planar Imaging (EPI) and accurate localization in functional MRI (fMRI). In this paper, the computation and applications of an average field map image template is investigated based on real field maps. The introduced methodology and the obtained field map image templates may be used in EPI and fMRI image analysis, distortion correction, registration, and functional localization when high-resolution field map images are not available for individual datasets. The introduced methodology involves three stages of pre-processing, registration, and spatial normalization. The analysis and results presented in this paper show the impact and usefulness of the investigated methodology in several applications.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Algorithms*
Echo-Planar Imaging / methods*
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Reproducibility of Results
Sensitivity and Specificity
Subtraction Technique*