. Author manuscript; available in PMC: 2016 Oct 31.

Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2015 Mar;62(3):475–493. doi: 10.1109/TUFFC.2014.006788

Table I. Parameters of the numerical breast phantom [44]–[46].

Structure index	Tissue type	Sound speed [mm·μs⁻¹]	Slope of attenuation [dB·(MHz)⁻^y·cm⁻¹]

0	Adipose	1.47	0.60
1	Parenchyma	1.51	0.75
2	Benign tumor	1.47	0.60
3	Benign tumor	1.47	0.60
4	Cyst	1.53	0.00217
5	Malignant tumor	1.565	0.57
6	Malignant tumor	1.565	0.57
7	Malignant tumor	1.57	0.57