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A, Axial T2 FSE (TR, 5890 ms; TE, 104 ms; echo train, 21; acquisition time, 2 minutes) performed without gating and resulting in a nondiagnostic image due to head rocking secondary to high-pressure ventilation.
B, Axial T2 FSE (TR, 6635 ms; TE, 89 ms; echo train, 21; acquisition time, 5 min). This is the same sequence and patient seen in A but with the addition of the navigator pulse.
