. Author manuscript; available in PMC: 2020 Oct 6.

Published in final edited form as: Ultrason Imaging. 2017 Jul 5;39(5):313–325. doi: 10.1177/0161734617713498

Table 2.

Average Parameters for Tissue Types at ONR.

Tissue	K (GPa)		Z (MRayl)		α (dB/cm/MHz)		c (m/s)		ρ (g/cm³)		n
LC	2.67^‡	±0.11	1.62^†	±0.02	6.22^‡	±2.03	1655^‡	±57	0.98*	±0.03	35
ON	2.53*	±0.10	1.57*	±0.02	3.99*	±1.27	1611*	±57	0.98*	±0.03	35
Ch	2.57*	±0.11	1.59^‡	±0.02	6.95^‡	±2.08	1612*	±63	0.99*	±0.04	35
Re	2.54*	±0.10	1.57*	±0.01	3.56*	±1.21	1618*	±58	0.97*	±0.03	35
Sc	2.79^†	±0.11	1.71^×	±0.05	9.94^†	±2.02	1629*	±53	1.05^‡	±0.05	35

Values are in means ± standard deviations. Material properties (i.e., K, Z, α, c, ρ, n) of different tissue types (i.e., LC, ON, Ch, Re, Sc) with different symbols (i.e., *, ‡, †, and ×) have significant different mean values (i.e., p < 0.05). For example, bulk modulus of Re (~2.54* GPa) is significantly smaller than that of Sc (~ 2.79† GPa). ONR = optic nerve region; LC = lamina cribrosa; ON = optic nerve; Ch = choroid; Re = retina; Sc = sclera.