Fig. 4.

Pulsation artifacts affect the tensor estimation.

(A) Volume-wise comparison of DWIs shows clear differences between triggered and non-triggered acquisitions. (B) The differences are propagated to the calculated (OLLS) tensor parameters, as seen on the FA modulated colored orientation maps. A coregistered slice of the Cincinnati Children's Hospital Medical Center infant brain template (https://irc.cchmc.org/software/infant.php) is shown in inset as reference for anatomical localization. (B) FA difference maps, and the principal eigenvectors' angular difference maps highlight areas most affected by pulsation artifacts. Representative data from a single subject, the angular difference maps are modulated by the FA difference map. See text for quantitative analysis of the data in the region of interest outlined by white.