• J Magn Reson Imaging · Nov 2004

    Effective blood signal suppression using double inversion-recovery and slice reordering for multislice fast spin-echo MRI and its application in simultaneous proton density and T2 weighted imaging.

    • Hideto Kuribayashi, Jean J Tessier, David R Checkley, Yi-Xiang Wang, Leif Hultin, and John C Waterton.
    • AstraZeneca, Global Sciences and Information, Alderley Park, Macclesfield, Cheshire, UK. hideto.kuribayashi@astrazeneca.com
    • J Magn Reson Imaging. 2004 Nov 1; 20 (5): 881-8.

    PurposeTo design a multislice double inversion-recovery fast spin-echo (FSE) sequence, with k-space reordered by inversion time at slice position (KRISP) technique, to produce black-blood vessel wall magnetic resonance imaging (MRI).Materials And MethodsIn this sequence, central k-space sampling for each slice is required at inversion time (TI) of the blood signal. To fill the entire k-space, the peripheral lines are obtained less or greater the TI and using a rotating slice order. Blood flow signal suppression was first evaluated using a phantom. Simulation studies were used to investigate FSE image quality. The final sequence was then applied to the rabbit abdominal aorta MRI at 4.7 T.ResultsIn the flow phantom study, artifacts from slow-flowing water were substantially reduced by the KRISP technique; residual water spins were dephased by the strong phase-encoding gradient required for peripheral k-space. These dephased spins flowed into the slice plane where the center of k-space was being acquired at the TI of the flowing water signal. Multislice black-blood MR images were successfully obtained in the rabbit abdomen using the sequence with the k-trajectory optimized by the simulation study.ConclusionThe KRISP technique was effective both in multislice double inversion-recovery FSE and in blood signal suppression.

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