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Table 3 Contrast ratio of the proposed method with different parameters

From: Plane wave imaging combined with eigenspace-based minimum variance beamforming using a ring array in ultrasound computed tomography

Method CR (dB)
PW with 32 elements (Fig. 8b) − 14.76
PW with 64 elements (Fig. 8d) − 17.58
Fewer PW emitting with 32 elements (Fig. 9a) − 14.74
Fewer PW emitting with 64 elements (Fig. 9c) − 17.20