High Resolution Estimation of Axial and Transversal Bloodflow with a 50 MHZ Pulsed Wave Doppler System for Dermatology

In this paper an approach for the combined estimation of axial and transversal velocity with special emphasis on high resolution is presented. Our proposed approach was tested using simulated data and measurements obtained from a flow phantom. With the estimated flow profile for the axial velocity it was shown that the flow profile inside the vessel with a diameter of 500 μm and with a flow rate of 0.18 μ1/s was parabolic. The proposed method gives adequate results at the center of the vessel, while the low velocities at the border are over estimated. With the combined estimation strategy complex vessel structures with unknown flow directions are taken into consideration. Subject of our future work is the imaging of the microcirculatory system of the skin.