Table 2.

Comparison between the sound power transmission coefficient (SPTC) calculated from the deflated (0 cm H₂O) lung impedance values (Z_def) determined herein at the indicated frequency f using an incident (water) impedance value of 1.5 Mrayl and the comparable literature-based ultrasound-induced lung damage ED₀₅ occurrence threshold (ED_{05 occ}). Selected rat Z_def values were interpolated (Int) because the literature-based rat ages were slightly different from those evaluated herein. Also, the Z_def values at frequencies less than 3.5 MHz were extrapolated to either 2.8 or 3.1 MHz.

From impedance study			From threshold studies
	Zdef (Mrayl)	SPTC	⟨age⟩	ED05occ(MPa)	f(MHz)	Reference
1 week pigs	0.79	0.904	5 d	3.60	3.1	O’Brien et al., 2003b
4–5 week pigs	0.76	0.893	39 d	5.83	3.1	O’Brien et al., 2003b
7–8 week Pigs	0.88	0.932	58 d	2.87	3.1	O’Brien et al., 2003b
2 week rats	1.22	0.989	12–14 d	2.44	2.8	O’Brien et al., 2008
2 week rats	1.20				5.6
3 week rats	1.17	0.985	22–24 d	3.00	2.8	O’Brien et al., 2008
3 week rats	1.16				5.6
7 week rats	1.11	0.978	53–62 d	3.24	2.8	O’Brien et al., 2008
7 week rats	1.12				5.6
Int (rats)	1.00	0.960	72 d	3.38	2.8	O’Brien et al., 2008
Int (rats)	1.00	0.960	10–11 week	2.30	2.8	Zachary et al., 2001a, 2001b
Int (rats)	1.05	0.969	10–11 week	2.80	5.6	Zachary et al., 2001a, 2001b
Int (rats)	1.00	0.960	10–11 week	3.60	2.8	O’Brien et al., 2001a, 2001b
Int (rats)	1.05	0.969	10–11 week	3.40	5.6	O’Brien et al., 2001a, 2001b
Int (rats)	1.00	0.960	10–11 week	3.13	2.8	O’Brien et al., 2003a
17 week rats	0.81				2.8
17 week Rats	0.88				5.6
52 week rats	0.91				2.8
52 week rats	1.02				5.6
12 week rabbits	1.07	0.972	76 d	3.43	5.6	O’Brien et al., 2006
3 year rabbits	1.00				5.6
5 year rabbits	1.08				5.6