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AIR-SPAMM: alternative inversion recovery spatial modulation of magnetization for myocardial tagging
Anthony H Aletras1, Raisa Z Freidlin, Gil Navon
1Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Building 10, Room B1D416, MSC 1061, Bethesda, MD 20892-1061, USA. Anthony_Aletras@nih.gov
Abstract:
Alternate inversion recovery spatial modulation of magnetization (AIR-SPAMM) can be used either for doubling the number of tags for a given tagging encoding gradient strength or for improving tagging contrast ratio. AIR-SPAMM requires only a single acquisition and utilizes inversion pulses spaced throughout the gradient recalled echo (GRE) cine acquisition to "lock" the recovering magnetization at a desired level. The theory of AIR-SPAMM is presented along with simulations and results from phantoms. AIR-SPAMM can be used either for imaging systole as demonstrated by initial in vivo results or potentially for imaging the entire cardiac cycle in a slice-interleaved manner.
