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. Author manuscript; available in PMC: 2007 Jan 3.
Published in final edited form as: Ultrasound Med Biol. 2006 Jun;32(6):857–874. doi: 10.1016/j.ultrasmedbio.2006.02.1428

Table 1.

Storage moduli, loss moduli and elastic contrasts at 1 Hz of the various components in the phantoms

MR elastography phantom
Ultrasound elastography phantom
Tissue-mimicking material Storage modulus (kPa) Loss modulus (kPa) Elastic contrast Storage modulus (kPa) Loss modulus (kPa) Elastic contrast
Fibroadenoma 99.7 ± 3.1 4.1 ± 0.1 2.35 ± 0.14 97.8 ± 2.9 6.5 ± 1.4 2.45 ± 0.11
Cancer 72.6 ± 3.7 4.0 ± 0.3 1.71 ± 0.12 64.6 ± 1.9 3.8 ± 0.6 1.62 ± 0.07
Glandular 42.5 ± 2.1* 2.7 ± 0.2* 1.00 39.9 ± 1.3* 2.3 ± 0.1* 1.00
Fat sphere 19.6 ± 2.5 1.5 ± 0.3 0.46 ± 0.06 20.6 ± 0.5 1.4 ± 0.1 0.52 ± 0.02
SF 20.1 ± 0.6 1.4 ± 0.1 0.47 ± 0.03 21.5 ± 0.6 1.5 ± 0.1 0.54 ± 0.02

The elastic contrast of a material equals its storage modulus divided by the storage modulus of the TM glandular material. SF = subcutaneous fat;

*

= “uncertainties” are standard deviations for values for all four layers of the TM glandular region.