Table 1

Comparison of intensities (Ei) and percentage attenuations δ E % of square-shaped (SQR), triangular (TRI) and the optimal (OPT) contour with respect to the circular (CIRC) taken as a basis

CIRC
 TRI
 SQR
 OPT

Zi mm
 Ei V/mm
 δ Ei %
 Ei V/mm
 δ Ei %
 Ei V/mm
 δ Ei %
 Ei V/mm
 δ Ei %
2
 3.55
 -
 3.7
 4
 3.99
 12
 4.1
 15
5
 2.65
 -
 2.62
 -1
 2.89
 9
 3.0
 13
10
 1.75
 -
 1.6
 -9
 1.82
 4
 1.92
 10
20
 0.9
 -
 0.72
 -25
 0.87
 -3
 0.93
 3
30
 0.525
 -
 0.38
 -38
 0.48
 -9
 0.52
 -1
40
 0.335
 -
 0.23
 -46
 0.295
 -13
 0.317
 -5.6
50
 0.225
 -
 0.15
 -50
 0.195
 -15
 0.21
 -7.1
100
 0.057
 -
 0.037
 -91
 0.048
 -17
 0.053
 -7.5

Papazov and Daskalov BioMedical Engineering OnLine 2002 1:1   doi:10.1186/1475-925X-1-1