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Literature DB >> 18982615

Fieldmap-free retrospective registration and distortion correction for EPI-based functional imaging.

Clare Poynton¹, Mark Jenkinson, Stephen Whalen, Alexandra J Golby, William Wells.

Abstract

We describe a method for correcting the distortions present in echo planar images (EPI) and registering the EPI to structural MRI. A fieldmap is predicted from an air / tissue segmentation of the MRI using a perturbation method and subsequently used to unwarp the EPI data. Shim and other missing parameters are estimated by registration. We obtain results that are similar to those obtained using fieldmaps, however neither fieldmaps, nor knowledge of shim coefficients is required.

Mesh：

Year: 2008 PMID： 18982615 PMCID： PMC2702772 DOI： 10.1007/978-3-540-85990-1_33

Source DB: PubMed Journal: Med Image Comput Comput Assist Interv

15 in total

Review 1. Sources of distortion in functional MRI data.

Authors: P Jezzard; S Clare
Journal: Hum Brain Mapp Date: 1999 Impact factor: 5.038

2. Removal of intravoxel dephasing artifact in gradient-echo images using a field-map based RF refocusing technique.

Authors: N k Chen; A M Wyrwicz
Journal: Magn Reson Med Date: 1999-10 Impact factor: 4.668

3. A global optimisation method for robust affine registration of brain images.

Authors: M Jenkinson; S Smith
Journal: Med Image Anal Date: 2001-06 Impact factor: 8.545

4. Improved optimization for the robust and accurate linear registration and motion correction of brain images.

Authors: Mark Jenkinson; Peter Bannister; Michael Brady; Stephen Smith
Journal: Neuroimage Date: 2002-10 Impact factor: 6.556

5. An evaluation of the use of magnetic field maps to undistort echo-planar images.

Authors: Rhodri Cusack; Matthew Brett; Katja Osswald
Journal: Neuroimage Date: 2003-01 Impact factor: 6.556

6. Requirements for room temperature shimming of the human brain.

Authors: Stuart Clare; John Evans; Peter Jezzard
Journal: Magn Reson Med Date: 2006-01 Impact factor: 4.668

7. Application of k-space energy spectrum analysis to susceptibility field mapping and distortion correction in gradient-echo EPI.

Authors: Nan-kuei Chen; Koichi Oshio; Lawrence P Panych
Journal: Neuroimage Date: 2006-02-15 Impact factor: 6.556

Fieldmap-free retrospective registration and distortion correction for EPI-based functional imaging.

Review 1. Sources of distortion in functional MRI data.

2. Removal of intravoxel dephasing artifact in gradient-echo images using a field-map based RF refocusing technique.

3. A global optimisation method for robust affine registration of brain images.

4. Improved optimization for the robust and accurate linear registration and motion correction of brain images.

5. An evaluation of the use of magnetic field maps to undistort echo-planar images.

6. Requirements for room temperature shimming of the human brain.

7. Application of k-space energy spectrum analysis to susceptibility field mapping and distortion correction in gradient-echo EPI.

8. A homogeneity correction method for magnetic resonance imaging with time-varying gradients.

9. Magnetic susceptibility measurement of insoluble solids by NMR: magnetic susceptibility of bone.

10. Correction for geometric distortion in echo planar images from B0 field variations.

1. Atlas-based improved prediction of magnetic field inhomogeneity for distortion correction of EPI data.