Christian T Stoeck1,2, Constantin von Deuster1,2, and Sebastian Kozerke1,2
In vivo cardiac DTI using spin-echoes has been demonstrated on MR
systems equipped with powerful gradients. In this study we investigate the dependency
of helix and transverse angle error on maximum gradient amplitude for second
order motion compensated diffusion encoding of the in-vivo heart.
Root-mean-square errors for helix and transverse angles were 15.0±3.7°,
11.0±1.8°, 10.3±2.4°, and 11.7±3.8°, 9.0±2.0°, 8.1±2.2° for gradient strengths
of 30mT/m, 40mT/m and 60mT/m when compared to data obtained at 74.5 mT/m
gradient strength. From the data it is concluded that second order motion
compensated diffusion encoding allows for in vivo cardiac DTI even on MR
systems with standard gradient amplitudes of 40 mT/m.