Reduced scan time 3D FLAIR using modulated repetition and inversion time

3D FLAIR imaging of the entire brain using an extended modulated refocusing pulse train is now possible within a clinically reasonable time. However, a longer repetition time (with dead time) is still used to allow for adequate signal recovery. We describe a technique which uses variable repetition and inversion time to reduce total scan time. The scan time is reduced considerably while maintaining near equal SNR and CNR when compared with the constant repetition time sequence.

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