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