Table 1.

Properties of phantoms.

Nylon	Fluid Filler	Diameter (μm)	Length (mm)	Scatter Number Density (# per cc)	Volume Fraction (%)	Frequency Range for Linear Fit (MHz)
-	CIRS #1	-	-	-	-	0.5 – 0.8
Green	CIRS #1	203	12	100	3.9	0.5 – 0.8
-	CIRS #2	-	-	-	-	0.3 – 0.7
Clear	CIRS #2	152	10	100	1.8	0.3 – 0.7
Clear	CIRS #2	203	10	100	3.2	0.3 – 0.7
Clear	CIRS #2	229	10	100	4.1	0.3 – 0.7
Clear	CIRS #2	330	10	100	8.5	0.3 – 0.5
Clear	CIRS #2	356	10	100	9.9	0.3 – 0.5
Clear	CIRS #2	152	12	100	2.2	0.3 – 0.7
Clear	CIRS #2	229	12	100	3.3	0.3 – 0.7
Clear	CIRS #2	152	12	200	4.4	0.3 – 0.7