Fig. 7

Reconstructed results at step distance d = 3 mm in Z = 1.5-mm plane. a Reconstructed acoustic distribution at step angle θ = 1.8°. b Reconstructed acoustic distribution at step angle θ = 3.6°. c Reconstructed acoustic distribution at step angle θ = 7.2°. d Reconstructed acoustic distribution at step angle θ = 14.4°. e Mean Squared Error distribution with a variety of step angles. f Correlation Coefficient distribution with a variety of step angles