Clutter Rejection methods in Doppler color flow imaging: Single-ensemble vs. multi-ensemble

Clutter filter which efficiently increases the estimation accuracy of blood flow velocity attracts much attentions in Doppler color flow imaging. In this paper, we briefly introduce several state-of-the-art clutter suppression methods based on our recently works and categorize them to the singleensemble method and multi-ensemble one. Then the computing complexity of all competing methods were analyzed in-depth to provide a valuable suggestion at the real clinical situations. Furthermore, two group of clinical experiments on volunteer's carotid artery and kidney data were used to evaluate performance between single-ensemble methods and multi-ensemble ones. The results verify that the single-ensemble method shows best clutter rejection when imaging single carotid vessel, while the multi-ensemble method achieves a higher performance for kidney imaging which includes multi-stage vessels.