Imaging Performance of Quantitative Transmission Ultrasound

Table 1

Speed-of-sound accuracy against the speed phantom measured with twin pistons.

Area	Mean; (M/S)	SD; (M/S)	Uniformity; (%)	Actual; (M/S)	Error; (M/S)	Error; (% actual)	Error (SD)
High	1571.9	18.1	1.15%	1566	5.9	0.37%	0.33
Low	1418.8	5.69	0.40%	1406	12.8	0.91%	2.25
Water	1508.6	7.09	0.46%	1510	1.4	0.09%	0.20
Background	1447.9	6.24	0.43%	1445	2.9	0.02%	0.46