FIG. 2.

Example of a cascaded channel experiment. The widths of the stenoses are 11 μm, 7 μm, and 5 μm in direction of flow from left to right. (a) A BG A rosette of class 4 is passing the first stenosis intact and eventually ruptured in the second one. The depicted micrographs are recorded at a frame rate of 2000 fps. (b) Example of the SURF result for rosettes of class 4. Top: the markers display the ends of the traces. Bottom: the markers indicate “real rupture events” with the size of the marker scaling with the area of the lost part of the rosette.