Table 2 Linearity of QCBCT and CAL_CBCT images compared with QCT images for measuring BMD at various bone sites of interest.

From: Validation of bone mineral density measurement using quantitative CBCT image based on deep learning

Group

Bone site

QCT

QCBCT

CAL_CBCT

Mean ± SD (mg/cm3)

Mean ± SD (mg/cm3)

Slope

r

R2

SEE (mg/cm3)

Mean ± SD (mg/cm3)

Slope

r

R2

SEE (mg/cm3)

 

All

840.41 ± 192.69

860.06 ± 209.88

1.00

0.92

0.85

81.06

379.89 ± 125.49

0.32

0.49

0.24

109.32

A

Maxilla

842.72 ± 191.08

867.99 ± 223.18

1.08

0.92

0.85

85.53

398.40 ± 124.64

0.35

0.53

0.28

105.41

Mandible

838.11 ± 194.70

852.13 ± 195.88

0.93

0.93

0.86

73.28

361.38 ± 123.88

0.29

0.46

0.21

110.00

B

Mx-Apical

762.13 ± 143.77

768.34 ± 159.92

0.95

0.86

0.73

81.84

328.68 ± 104.55

0.33

0.46

0.21

92.33

Mx-Middle

807.34 ± 186.40

825.15 ± 216.57

1.09

0.94

0.88

75.71

388.77 ± 111.20

0.34

0.57

0.32

90.99

Mx-Coronal

958.68 ± 183.46

1010.49 ± 214.07

1.05

0.90

0.81

93.15

477.75 ± 111.08

0.13

0.21

0.04

107.86

C

Mn-Coronal

910.29 ± 201.41

908.81 ± 208.98

0.98

0.95

0.90

66.84

423.46 ± 111.53

0.20

0.37

0.14

103.01

Mn-Middle

820.87 ± 180.51

839.34 ± 178.25

0.90

0.91

0.83

73.39

373.39 ± 117.95

0.33

0.50

0.25

101.49

Mn-Apical

783.16 ± 181.63

808.23 ± 188.05

0.94

0.91

0.83

77.08

287.29 ± 102.46

0.18

0.32

0.10

96.41

D

Mx-Incisor

857.72 ± 217.62

863.49 ± 242.40

1.05

0.95

0.89

78.36

368.75 ± 139.90

0.39

0.60

0.37

110.74

Mx-Premolar

790.93 ± 173.10

835.05 ± 207.82

1.10

0.92

0.84

82.40

368.43 ± 103.36

0.31

0.52

0.27

87.95

Mx-Molar

879.50 ± 170.07

905.44 ± 215.27

1.15

0.91

0.83

88.66

458.01 ± 106.70

0.25

0.40

0.16

96.97

E

Mn-Incisor

969.26 ± 216.89

965.32 ± 223.84

0.98

0.95

0.90

70.09

371.70 ± 159.45

0.33

0.45

0.21

141.04

Mn-Premolar

786.32 ± 137.42

807.98 ± 149.50

0.91

0.84

0.71

80.48

339.58 ± 100.94

0.35

0.48

0.23

88.14

Mn-Molar

758.75 ± 149.38

783.08 ± 154.69

0.93

0.90

0.81

67.00

372.84 ± 100.68

0.42

0.62

0.39

78.16

  1. Slope, slope of the linear regression; r, correlation coefficient; R2, coefficient of determination; SEE, standard error of estimation; Mx, maxilla; Mn, mandible.
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