Table 3: Quantitative TRSAM evaluation at a center frequency of 1 GHz for thickness, sound velocity, acoustic impedance, density, elastic modulus, and attenuation of MCF-7 breast cancer cells transitioning from early into late apoptosis (From Strohm, Czarnota et al. 2010 and Strohm, Pasternak et al. 2010).

- Early Apoptosis Late Apoptosis Water
Thickness [ µm ] 15.3 ± 2.4 12.5 ± 2.1 NA
Sound velocity [ m/s ] 1588 ± 20 1555 ± 13 1521
Acoustic impedance [ MRayls ] 1.554 ± 0.014 1.537 ± 0.009 1.521
Density [ g/cm3 ] 979 ± 13 988 ± 7 1000
Elastic modulus [ GPa ] 2.47 ± 0.04 2.39 ± 0.03 2.31
Attenuation [ dB/cm/MHz ] 2.00 ± 0.45 1.40 ± 0.64 0.0014