A new method for Doppler clutter rejection based on irregular sampling and iterative spline reconstruction

The low frequency and high amplitude clutter signal constitutes a great disturbance for the discrimination of low velocity blood flow signals in a Doppler ultrasound measurement system. In this letter, a novel method for clutter rejection is proposed, incorporating irregular sampling and iterative reconstruction by cubic spline. Experimental results indicate this approach outperforms the traditional way of high-pass filtering with its effective elimination of clutter and preservation of low velocity blood component in the overlapped frequency region.