FIG 1. Comparison of images parameters in terms of high-intensity CSF artifacts on fast-FLAIR images obtained in a 37-year-old healthy male volunteer (volunteer 5).

A, Image obtained with section FC, TRF, and interleaving acquisition factor of 3 shows better CSF nulling at prepontine cistern (arrow) than the images in B or C. Notably, in pulse sequences with better CSF nulling at prepontine cistern, fewer high-intensity CSF artifacts are present at the aqueduct (arrowhead).

B, Image obtained with FC, TRF, and an interleaving acquisition factor of 2.

C, Image obtained with only TRF.

D, Additional superior and inferior presaturation does not decrease the high-intensity CSF artifacts (see image in B).

E and F, Images obtained with FC alone without TRF (E) or with superior and inferior presaturations (saturation bands of 80 mm) without TRF (F) demonstrate substantial high-intensity CSF artifacts at the prepontine cistern.