Enhancing effect of phase circular statistics vector for improvement imaging quality of ultrasonic total focusing method

For further improving the quality of Total Focusing Method (TFM) imaging,an ultrasonic TFM based on Phase Circular Statistics Vector (PCSV) has been presented.Firstly,the information of the signal phases of the Full Matrix Capture (FMC) aperture data is extracted in the TFM implement processes.The phases of the same focusing pixel were regarded as the samples of the circular statistics.Then the PCSVs determined by the signal amplitudes and phases were acquired by using the operation of saturation weighted statistics.Finally,the magnitudes of the PCSV were equivalent to the amplitudes of the TFM image.The results showed that the TFM-PCSV was capable of improving SNR by amplifying the contribution of phase information.Also,the method could improve the lateral resolution by enhancing aperture beam directivity.Compared to the phase coherence weighted algorithm SCF and CCF,the TFM-PCSV has higher tolerance to the error of phases.