Fig.Ā 8From: Plane wave imaging combined with eigenspace-based minimum variance beamforming using a ring array in ultrasound computed tomographyResults of the plane wave method in the computer simulation with half and one-fourth of the emission events. a, c The plane wave- ESBMV method with 32 elements. b, d The plane wave- ESBMV method with 64 elements. In a, b, \(\Delta N\) is 16, while the value is 32 in c, dBack to article page