Figure 10.

In vitro motion robustness results. (a)–(c) Results using 8 cycles at 10 Hz with a 1 Hz background motion of 500 μm amplitude. (a) Displacements before high-pass filtering: cumulative displacements obtained from accumulating frame to frame displacements. (b) Bandpass filtered displacement superimposed on the magnetic cycles. (c) CEM map clearly identifies the inclusion of iron oxide microparticles. (d) Correlation contrast function versus number of magnetic cycles for static case (blue dots, no background motion) and 1 Hz motion (red squares, 500 μm) and 2 Hz (green diamonds, 100 μm).