Short-lag filtered-delay multiply and sum beamformer combined with sign coherence factor in ultrasound imaging

A short-lag filtered-delay multiply and sum (FDMAS) beamforming algorithm, which can be considered as a variant of F-DMAS, has recently been proposed. In this method, the signals in the regions of low lags (short-lag) are used, and the computation complexity is reduced accordingly. In fact, the short-lag regions can efficiently reflect the spatial coherence. Thus, we proposed a method to combine this algorithm with the Sign Coherence Factor (SCF). In the simulation test, our proposed method demonstrate better contrast and resolution in comparison with the F-DMAS.