Figure 4

Deformation function. The variation of the bending radius R _d (x _{S 2}, t) in the centre of the deformation is plotted with respect to the cardiac cycle, represented by a EKG trace. The time shift with respect to the cardiac cycle is denoted by Δt, i.e. the solid line has zero time shift, while the dotted and dashed lines are shifted by ± 100 ms respectively. The periodic function g(t) in equation 3, was chosen according to IVUS measurements in [51].