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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: Spine J. 2010 Mar 27;10(5):422–432. doi: 10.1016/j.spinee.2010.02.008
Sample
Number		 Attenuation at
1MHz (dB/cm)		 BUA (dB/cm
MHz)		 Speed of Sound
at 1 MHz (m/s)		 Integrated
Backscatter
Coefficient (dB)
#1 33.15±1.17 53.85±4.78 1930.0±36.26 −124.73±1.71
#2 29.92±3.56 49.73±7.64 2070.8±33.25 −118.36±6.11
#3 30.46±1.88 46.33±8.30 2145.6±26.27 −117.80±1.66
#4 25.86±0.80 43.98±5.52 2005.8±22.76 −135.05±4.27