Figure 13

DENSE k-space. Three echoes are generated in DENSE: stimulated echo, stimulated anti-echo, and T1 relaxation echo. Only the stimulated echo contains the displacement information of interest, while other echoes are to be suppressed. The bigger the displacement encoding frequency, the larger the separation between the stimulated echo and the T1 relaxation echo, which results in displacement-encoded image not corrupted by other signals. The T1 relaxation echo can be also suppressed by inversion recovery or phase cycling (as in CSPAMM). The anti-echo may be added to the stimulated echo after phase correction to improve SNR.