Table 1.

Summary of properties of the 4000E and 5000E TM phantoms.

Quantity	4000E TM phantom	5000E TM phantom
Bead concentration (g∕l)	6.00	15.60
Mean bead diameter (µm)	5.40	5.16
Thin layer covering	TPX	Saran wrap
Density (g∕ml)	1.045	1.062
Speed of sound (m∕s)	1541	1541
Atten. α0 (dB∕cm)	0.107	0.069
Atten. n	1.52	1.66
BSC at 30 MHz (sr−1cm−1)	0.040	0.130