Same section position with spin-echo T1-weighted sequences at 1

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Top row, Images from a coronally oriented cine CT scan of the rabbit brain from the level of the pons (section 1) to the parieto-occipital cerebrum (section.

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A and B, Normal heavily T2-weighted turbo spin-echo (2800/1100 ms, flip angle 150°, acquisition time 7 seconds) MR sialograms obtained before (A) and after.

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Left, T1 spin-echo image at 1

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Same section position with spin-echo T1-weighted sequences at 1 Same section position with spin-echo T1-weighted sequences at 1.5T (upper row: TR, 700 ms; TE, 10 ms; section thickness, 5 mm; matrix, 256 × 192; FOV, 220 × 220 mm2; bandwidth, 200 Hz/pixel) and 3T (lower row: same imaging parameters). Same section position with spin-echo T1-weighted sequences at 1.5T (upper row: TR, 700 ms; TE, 10 ms; section thickness, 5 mm; matrix, 256 × 192; FOV, 220 × 220 mm2; bandwidth, 200 Hz/pixel) and 3T (lower row: same imaging parameters). Flip angles decreasing from left to right 130°, 110°, 90°, 70°, 50°. The lowest flip angle shows the best gray-to-white matter contrast. The effect is stronger at higher field. Bernd L. Schmitz et al. AJNR Am J Neuroradiol 2005;26:2229-2237 ©2005 by American Society of Neuroradiology