Fast diffusion tensor imaging and tractography of the whole cervical spinal cord using point spread function corrected echo planar imaging

TY - JOUR

T1 - Fast diffusion tensor imaging and tractography of the whole cervical spinal cord using point spread function corrected echo planar imaging

AU - Lundell, Hans Magnus Henrik

AU - Barthelemy, Dorothy

AU - Biering-Sørensen, Fin

AU - Cohen-Adad, Julien

AU - Nielsen, Jens Bo

AU - Dyrby, Tim Bjørn

N1 - CURIS 2013 NEXS 001

PY - 2013/1

Y1 - 2013/1

N2 - Diffusion tensor imaging has been used in a number of spinal cord studies, but severe distortions caused by susceptibility induced field inhomogeneities limit its applicability to investigate small volumes within acceptable acquisition times. A way to evaluate image distortions is to map the point spread function of the voxel intensity in a reference scan. In this study, the point spread function was mapped for an echo-planar imaging sequence in the human cervical spinal cord with isotropic resolution and large field of view. Correction with the point spread function map improved anatomical consistency, and full cervical tractography was thereby possible from a C1 seed region in healthy controls and one individual with spinal cord injury. It is suggested that point spread function mapping of the spinal cord can be used in combination with sequence-based methods for reduction of susceptibility artifacts or in high-field imaging settings where off-resonance effects are pronounced. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc.

AB - Diffusion tensor imaging has been used in a number of spinal cord studies, but severe distortions caused by susceptibility induced field inhomogeneities limit its applicability to investigate small volumes within acceptable acquisition times. A way to evaluate image distortions is to map the point spread function of the voxel intensity in a reference scan. In this study, the point spread function was mapped for an echo-planar imaging sequence in the human cervical spinal cord with isotropic resolution and large field of view. Correction with the point spread function map improved anatomical consistency, and full cervical tractography was thereby possible from a C1 seed region in healthy controls and one individual with spinal cord injury. It is suggested that point spread function mapping of the spinal cord can be used in combination with sequence-based methods for reduction of susceptibility artifacts or in high-field imaging settings where off-resonance effects are pronounced. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc.

U2 - 10.1002/mrm.24235

DO - 10.1002/mrm.24235

M3 - Journal article

C2 - 22396180

SN - 0740-3194

VL - 69

SP - 144

EP - 149

JO - Magnetic Resonance in Medicine

JF - Magnetic Resonance in Medicine

IS - 1

ER -