. Author manuscript; available in PMC: 2013 Aug 19.

Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Jun;59(6):1167–1181. doi: 10.1109/tuffc.2012.2307

TABLE II.

Contrast-To-Noise Ratio (CNR) of the Lesions on Shear Velocity Images and B-Mode Images.

Treatment parameters (pulses/location)	CNR in agar phantoms		CNR in ex vivo kidneys
Treatment parameters (pulses/location)	Shear wave velocity image	B-mode image	Shear wave velocity image	B-mode image
0 (control)	0.1 ± 0.1	0.1 ± 0.1	0.1 ± 0.1	0.1 ± 0.1
100	6.0 ± 1.1	0.5 ± 0.1	1.2 ± 0.6	0.2 ± 0.2
200	6.8 ± 1.2	0.7 ± 0.1	1.8 ± 0.8	0.3 ± 0.2
300	7.3 ± 1.4	0.9 ± 0.1	2.4 ± 0.8	0.4 ± 0.2
500	8.1 ± 1.0	1.1 ± 0.1	2.6 ± 0.9	0.6 ± 0.2
1000	8.9 ± 2.8	1.3 ± 0.1	3.2 ± 0.9	0.8 ± 0.2
1500	8.2 ± 3.3	1.3 ± 0.1	3.1 ± 1.2	0.9 ± 0.2
2000	5.3 ± 2.8	1.4 ± 0.1	3.0 ± 1.2	1.0 ± 0.3

The mean ± standard deviation is listed (N = 9 for phantom studies; N = 8 for ex vivo tissue studies).