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.
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Jezzard, P., Balaban, R.: Correction for geometric distortion in echo planar images from B0 field variations. Magn. Reson. Med. 34, 65–73 (1995)
Cusack, R., Brett, M., Osswald, K.: An evaluation of the use of magnetic field maps to undistort echo-planar images. NeuroImage 18, 127–142 (2003)
Hutton, C., Bork, A., Josephs, O., Deichman, R., Ashburner, J., Turner, R.: Image Distortion Correction in fMRI: A Quantitative Evaluation. NeuroImage 16, 217–240 (2002)
Jezzard, P., Clare, S.: Sources of Distortion in Functional MRI Data. Human Brain Mapping 8, 80–85 (1999)
Clare, S., Evans, J., Jezzard, P.: Requirements for Room Temperature Shimming of the Human Brain. Magnetic Resonance in Medicine 55, 210–214 (2006)
Jenkinson, M., Wilson, J.L., Jezzard, P.: Perturbation Method for Magnetic Field Calculations of Nonconductive Objects. Magn. Reson. Med. 52, 471–477 (2004)
Hopkins, J.A., Wehrli, F.W.: Magnetic susceptibility measurement of insoluable solids by NMR: magnetic susceptibility of bone. Magn. Reson. Med. 37, 494 (1997)
Chen, N.K., Wyrwicz, A.M.: Removal of intravoxel dephasing artifact in gradient-echo images using a field-map based RF refocusing technique. Magn. Reson. Med. 42, 807–812 (1999b)
Noll, D.C., et al.: A homogeneity correction method for magnetic resonance imaging with time varying gradients. IEEE Trans. Med. Im., 10, 629–637 (1991)
Weisskoff, R.M., Davis, T.: Correcting gross distortion on echo planar images. Soc. Magn. Res. Abstr. 11, 4515 (1992)
Bowtell, R., et al.: Correction of geometric distortion in echo planar images. Soc. Magn. Res. Abstr. 2, 411 (1994)
Wan, X., Gullbert, G.T., Parker, D.: Reduction of geometric distortion in echo-planar imaging using a multi-reference scan. Soc. Magn. Res. Abstr. 3, 103 (1995)
Chen, N.K., Oshio, K., Panych, L.: Application of k-space energy spectrum analysis to susceptibility field mapping and distortion correction in gradient-echo EPI. NeuroImage 31, 609–622 (2006)
Koch, K.M., et al.: Rapid calculations of susceptibility-induced magnetostatic field perturbations for in vivo magnetic resonance. Phys. Med. Biol. 51, 6381–6402 (2006)
Smith, S.: Fast Robust Automated Brain Extraction. Human Brain Mapping 17(3), 143–155 (2002)
Jenkinson, M.: A fast, automated n-dimensional phase unwrapping algorithm. Magnetic Resonance in Medicine 49(1), 193–197 (2003)
Jenkinson, M.: Improving the registration of B0-disorted EPI images using calculated cost function weights. In: 10th Int. Conf. on Func Mapping Human Brain (2004)
Jenkinson, M., Smith, S.: A Global Optimisation Method for Robust Affine Registration of Brain Images. Medical Image Analysis 5(2), 143–156 (2001)
Jenkinson, M., et al.: Improved Optimisation for the Robust and Accurate Linear Registration and Motion Correction of Brain Images. NeuroImage 17(2), 825–841 (2002)
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© 2008 Springer-Verlag Berlin Heidelberg
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Poynton, C., Jenkinson, M., Whalen, S., Golby, A.J., Wells, W. (2008). Fieldmap-Free Retrospective Registration and Distortion Correction for EPI-Based Functional Imaging. In: Metaxas, D., Axel, L., Fichtinger, G., Székely, G. (eds) Medical Image Computing and Computer-Assisted Intervention – MICCAI 2008. MICCAI 2008. Lecture Notes in Computer Science, vol 5242. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85990-1_33
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DOI: https://doi.org/10.1007/978-3-540-85990-1_33
Publisher Name: Springer, Berlin, Heidelberg
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