Table 2.

Setting of SOS for each tissue in the numerical breast phantom dataset

Tissue	Speed-of-sound value (m/s)
	1	2	3	4
Background	1480	1480	1480	1480
Fibro-glandular	$1570\pm 10$	$1570\pm 10$	$1580\pm 20$	$1570\pm 10$
Fat	$1510\pm 10$	$1420\pm 10$	$1520\pm 10$	$1475\pm 35$
Skin	$1445\pm 5$	$1445\pm 5$	$1445\pm 5$	$1425\pm 15$
Blood vessel	$1520\pm 10$	$1520\pm 10$	$1520\pm 10$	$1520\pm 10$