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Table 1 Values of bone mineral density using dual-source DECT and QCT

From: Accuracy and precision of volumetric bone mineral density assessment using dual-source dual-energy versus quantitative CT: a phantom study

  L1 (50 mg/cm3) L2 (100 mg/cm3) L3 (200 mg/cm3)
Scan DECT QCT DECT QCT DECT QCT
1 49.6 42.7 100.8 92.0 197.3 189.7
2 51.1 43.6 98.3 93.2 203.2 191.4
3 50.8 44.2 97.2 91.2 202.2 190.2
4 53.2 45.3 101.2 94.5 198.2 191.8
5 48.8 44.2 102.2 93.9 199.9 193.4
6 47.1 46.2 101.3 95.8 202.3 194.6
7 50.9 51.2 99.4 95.7 203.3 195.3
8 54.2 49.3 98.3 92.7 198.1 191.4
9 48.2 41.1 97.3 96.3 199.2 193.9
10 50.8 43.8 101.2 97.3 201.1 194.9
Mean ± standard deviation 50.47 ± 2.17 45.16 ± 3.04 * 99.72 ± 1.84 94.26 ± 2.00 * 200.48 ± 2.24 192.66 ± 2.02 *
Relative measurement error (%) 0.94 9.68 0.28 5.74 0.24 3.67
Absolute measurement error 0.47 4.84 0.28 5.74 0.48 7.34
  1. Measured BMD values for L1 (50 mg/cm3), L2 (100 mg/cm3), and L3 (200 mg/cm3) using dual-source DECT and QCT imaging. DECT-derived BMD values were closer to true HA concentrations and differed significantly from those obtained by QCT in L1 (p < 0.001), L2 (p < 0.001), and L3 (p < 0.001)
  2. *p < 0.001
  3. BMD Bone mineral density, L Lumbar vertebra equivalent, DECT Dual-energy computed tomography, QCT Quantitative computed tomography, HA Hydroxyapatite