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Fig 1. Healthy volunteer. Transverse multisection single-shot, fast spin-echo, fluid-attenuated inversion recovery (SS-FSE-FLAIR) (repetition time [TR]/echo time [TE]eff/inversion time [TI] = 8800/124/2200 ms) (A) and standard SS-FSE-FLAIR (B) images at rest, corresponding images with slow nodding (C and D), and a standard SS-FSE-FLAIR image with moderate nodding (E). Pulsatile CSF flow artifacts are seen in the region of the foramen of Monro, but no high-signal-intensity artifacts are seen elsewhere in the CSF (A and B). In C, the multisection image is badly degraded by motion. The corresponding standard SS-FSE-FLAIR image (D) is not degraded by motion artifact, but high signal intensity is seen in the CSF around the frontal lobes (arrows). With moderate nodding additional high-signal-intensity artifacts are seen on the SS-FSE-FLAIR image in the frontal horns of the lateral ventricles and in sulci of the occipital lobes (E, arrow). There is still no overall motion degradation. Slightly higher gray-white matter contrast is seen in the frontal lobes in C and E compared with B.
