Figure 4
From: Cardiac MR Elastography: Comparison with left ventricular pressure measurement
Variation of wave amplitudes U ( t ) observed by MRE compared with invasively measured LV pressure p ( t ) in three pigs (a, b, and c, corresponding to animals 1, 2 and 3). The animals investigated had different heart rates and pressure levels, giving rise to different relative wave amplitude changes and amplitude offsets in MRE. Figure d shows the linear regression of U(p) in all pigs.