FIG 2. Comparison of images obtained with (left) and without (right) a fast recovery pulse in a volunteer. The contrast-to-noise ratio in the image with a fast recovery pulse is 41.1 and in the image without a fast recovery pulse is 24.3. This image was obtained with a TR of 1500 ms and a TE of 243.8 ms. The circles in the images indicate the regions of interest for CSF in the cistern and cerebellum.