Keywords: Data Acquisition, Diffusion Tensor Imaging, Cardiac Diffusion Tensor Imaging
Motivation: High gradient hardware has the potential to reduce TE and improve SNR for Cardiac diffusion tensor imaging (cDTI) for both single-shot (SS-EPI) and multi-shot EPI (MS-EPI) approaches. However, gradient amplitude and slew rate can be limited due to Peripheral and Cardiac Nerve stimulation (PNS/CNS).
Goal(s): To compare Gmax=200mT/m and Gmax=80mT/m systems for cDTI.
Approach: Healthy volunteers (n=3) were imaged on both systems using SS-EPI and MS-EPI. PNS/CNS and diffusion parametric mapping were compared.
Results: Equivalent diffusion parameters were found for all acquisitions and systems. At Gmax=200mT/m, MS-EPI used the hardware system efficiently due to reduced PNS but remained limited by CNS.
Impact: In this work, we studied hardware limitations due to PNS/CNS for two high-gradient systems for SS-EPI and MS-EPI. MS-EPI reduces image distortions due to B0 inhomogeneities, improves SNR compared to SS-EPI, and used the most efficiently the hardware system.
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