Fig. 5: Blood vessel imaging and blood flow dynamics.
From: Multi-point sensing organic light-emitting diode display based mobile cardiovascular monitor

a The system block diagram for high-resolution dynamic imaging sensing (HDIS). b Multi-finger blood vessel imaging and blood flow dynamics sensing results (principle and measurement results). c HDIS-based Biosensing : a spatial sensing in the multiple positions within the sensing area and spatial-temporal sensing are possible due to the abundant information captured.