AIR-SPAMM: alternative inversion recovery spatial modulation of magnetization for myocardial tagging.
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.
Aletras
Anthony H
AH
Laboratory 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
Freidlin
Raisa Z
RZ
Navon
Gil
G
Arai
Andrew E
AE
D000818:Animals; D004285:Dogs; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009206:Myocardium; D019047:Phantoms, Imaging