Phased array ghost elimination (PAGE) for segmented SSFP imaging with interrupted steady-state.
Steady-state free precession (SSFP) has recently proven to be valuable for cardiac imaging due to its high signal-to-noise ratio and blood-myocardium contrast. Data acquired using ECG-triggered, segmented sequences during the approach to steady-state, or return to steady-state after interruption, may have ghost artifacts due to periodic k-space distortion. Schemes involving several preparatory RF pulses have been proposed to restore steady-state, but these consume imaging time during early systole. Alternatively, the phased-array ghost elimination (PAGE) method may be used to remove ghost artifacts from the first several frames. PAGE was demonstrated for cardiac cine SSFP imaging with interrupted steady-state using a simple alpha/2 magnetization preparation and storage scheme and a spatial tagging preparation.
Kellman
Peter
P
Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892-1061, USA. kellman@nih.gov
Guttman
Michael A
MA
Herzka
Daniel A
DA
McVeigh
Elliot R
ER
D016477:Artifacts; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000033:anatomy & histology* / Q000502:physiology; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement; D012016:Reference Values; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted