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European Radiology Experimental

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
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