Velocimetry of red blood cells in microvessels by the dual-slit method: Effect of velocity gradients

► Physical understanding of red blood cells velocimetry by temporal cross-correlation. ► New operational criteria for implementing the dual-slit technique ► In particular, the slits separation distance must be 5 to 10 red blood cell size. ► With these criteria, the measured velocity is the maximal velocity through the vessel. ► Blunt velocity profiles measured with high spatial resolution