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FIG 5. Contrast-to-noise (C/N) ratios at various echo spacing values. Wider echo spacing permits a narrower bandwidth, but the effective echo time is prolonged if the center of the echo train length is selected as the effective TE to prevent blurring and ghost artifacts. At a TR of 1500 ms, the highest contrast-to-noise ratio was obtained with an echo spacing of 18.1 ms and a bandwidth of 38 kHz.
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