Speckle Reduction for Ultrasonic Imaging Using Frequency Compounding and Despeckling Filters along with Coded Excitation and Pulse Compression

Figure 8

Histograms of experimental measurements for the following: (a) CP and (b) REC reference scans, (c) REC-FC (third-width), (d) eREC-FC, (e) eREC-FC with median filtering, (f) eREC-FC with Lee filtering, (g) eREC-FC with homogeneous mask area filtering, (h) eREC-FC with geometric filtering, and (i) eREC-FC with SRAD (dark: background region; light: target region).

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