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Table 1 Median, interquartile, and total ranges of QUS, mechanics, μCT, and UTE-MRI measures of the bone strips

From: Ultrasound attenuation of cortical bone correlates with biomechanical, microstructural, and compositional properties

QUS

Mechanics

μCT

UTE-MRI

SoS (km/s)

α (db/mm)

E (GPa)

BMD (g/cm3)

Porosity (%)

Pore size (μm)

T1 (ms)

MMF (%)

T2-MM (μs)

TWPD (mol/L)

BWPD (mol/L)

PWPD (mol/L)

MTR-800 (%)

MTR-600 (%)

MTR-400 (%)

3.20 ± 0.20 [2.70–3.40]

7.30 ± 3.95 [0.70–12.40]

18.8 ± 2.4 [15.1–23.7]

1.30 ± 0.14 [1.10–1.46]

3.5 ± 4.3 [0.5–13.2]

71 ± 43 [43–147]

258 ± 10 [242–276]

34.8 ± 4.2 [29.2–38.5]

11.3 ± 0.3 [10.9–11.8]

11.2 ± 1.0 [10.0–14.6]

6.4 ± 0.85 [5.4–7.4]

4.8 ± 0.8 [4.2–8.0]

42.7 ± 2.5 [38.2–44.4]

31.3±1.6 [27.6–32.5]

17.1±1.2 [14.8–18.1]

  1. α Attenuation coefficient, BMD Bone mineral density, BWPD Bound water proton density, E Elastic modulus, μCT Microcomputed tomography, MMF Macromolecular fraction, MRI Magnetic resonance imaging, MTR Magnetization transfer ratio (MTR-800, MTR-600, and MTR-400 refer to MTR at 2KHz for 800°, 600°, and 400° pulse power level), PWPD Pore water proton density, QUS Quantitative ultrasound, SoS Speed of sound, T2-MM Macromolecular T2, TWPD Total water proton density, UTE Ultrashort echo time