Correction for Eddy Current-Induced Echo-Shifting Effect in Partial-Fourier Diffusion Tensor Imaging

Figure 4

(a) to (c) show that the k-space data obtained with the conventional partial-Fourier DTI sequence, corresponding to different numbers of overscans, may be affected by a truncation artifact (i.e., Type 1 artifact) in the presence of an eddy current-induced echo-shifting effect. (d) to (f) show that this truncation artifact can be avoided in partial-Fourier DTI data obtained with the proposed k-space energy-anchored pulse sequence, where the k-space coverage moves with the echo-shifting effect.

(a)

(b)

(c)

(d)

(e)

(f)