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. 2003 Jun-Jul;24(6):1254-6.

Sensitivity-encoded diffusion tensor MR imaging of the cervical cord

Mara Cercignani  1 , Mark A Horsfield, Federica Agosta, Massimo Filippi
Affiliations

Sensitivity-encoded diffusion tensor MR imaging of the cervical cord

Mara Cercignani et al. AJNR Am J Neuroradiol. 2003 Jun-Jul.

Abstract

The aim of this study was to apply sensitivity-encoding (SENSE) echo-planar imaging (EPI) to diffusion tensor MR imaging of the cervical cord, an anatomic region where MR imaging is particularly challenging. This technique was implemented with a SENSE reduction factor of 2 and used for imaging a water phantom and five healthy volunteers. Off-resonance artifacts were notably reduced compared with those of full-FOV EPI sequences. This approach to diffusion tensor MR imaging of the cervical cord is promising for future, more extensive clinical applications.

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Figures

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Fig 1.
Mean diffusivity (left) and FA (right) maps obtained in a healthy volunteer by using the SENSE EPI sequence. The advantage of SENSE over standard EPI is the reduction of off-resonance artifacts due to an increased bandwidth in the phase-encoding direction. As a consequence, images are less sensitive to susceptibility variations. The aliasing caused by the reduction of the FOV can be resolved by exploiting the coil sensitivity as a signal intensity encoding. In this study, the standard four-element neck coil was used to show the feasibility of the technique on a commercial machine with no dedicated hardware.
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