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Table 2 Nomograms of 3D fetal thoracic parameters from 13 to 40 gestational week (n = 1077)

From: Reference range of fetal thorax using two-dimensional and three-dimensional ultrasound VOCAL technique and application in fetal thoracic malformations

GA(No.)

Lung volume (cm3)

Thoracic volume (cm3)

Lung-to-thoracic volume ratio

P2.5

P50

P97.5

\(\overline{x}\)

SD

P2.5

P50

P97.5

\(\overline{x}\)

SD

P2.5

P50

P97.5

\(\overline{x}\)

SD

13(28)

1.75

2.72

3.85

2.79

0.61

4.03

6.24

9.04

6.50

1.43

0.416

0.430

0.445

0.430

0.008

14(30)

2.36

3.12

4.32

3.18

0.55

5.25

7.06

10.08

7.22

1.27

0.428

0.439

0.460

0.441

0.009

15(27)

2.64

3.67

4.74

3.72

0.54

5.91

8.15

10.69

8.26

1.17

0.436

0.451

0.468

0.451

0.008

16(29)

3.12

3.88

5.23

4.04

0.53

6.64

8.52

11.26

8.74

1.17

0.444

0.461

0.478

0.462

0.010

17(26)

3.83

4.81

6.25

4.82

0.57

8.24

10.08

13.04

10.18

1.18

0.458

0.474

0.486

0.473

0.008

18(34)

5.84

6.72

7.64

6.73

0.51

12.34

14.01

15.93

14.04

1.01

0.466

0.480

0.492

0.479

0.007

19(34)

6.83

8.83

11.34

9.13

1.11

14.25

18.20

23.15

18.90

2.32

0.471

0.483

0.498

0.483

0.006

20(36)

9.28

11.43

13.72

11.38

1.23

18.75

23.64

27.94

23.22

2.51

0.476

0.491

0.490

0.007

0.007

21(40)

11.16

13.59

15.49

13.54

1.07

22.32

27.04

31.54

27.10

2.16

0.489

0.500

0.518

0.500

0.008

22(47)

12.63

14.84

16.61

14.78

0.96

24.88

28.90

32.79

29.08

1.89

0.493

0.510

0.522

0.508

0.007

23(59)

15.07

17.37

19.38

17.29

1.34

29.08

33.86

37.76

33.65

2.61

0.501

0.514

0.528

0.514

0.005

24(62)

17.91

20.26

23.46

20.37

1.50

34.51

39.21

45.08

39.27

2.86

0.508

0.520

0.528

0.519

0.005

25(60)

21.03

23.41

25.49

23.41

1.24

39.78

44.87

48.49

44.63

2.40

0.513

0.525

0.534

0.525

0.005

26(55)

25.40

28.23

30.69

28.01

1.46

48.17

53.27

57.40

52.90

2.57

0.520

0.529

0.538

0.529

0.005

27(49)

27.76

31.13

33.96

30.96

1.44

51.93

58.36

63.23

58.01

2.72

0.524

0.535

0.542

0.534

0.005

28(47)

33.47

35.76

37.87

35.97

1.07

62.61

66.71

70.67

66.67

2.02

0.526

0.539

0.551

0.540

0.006

29(44)

37.18

40.40

43.59

40.43

1.53

68.52

74.16

80.26

74.02

2.60

0.532

0.548

0.564

0.546

0.007

30(43)

40.90

44.16

47.21

44.28

1.70

75.31

80.36

86.11

80.27

2.79

0.536

0.553

0.565

0.552

0.008

31(42)

45.15

48.38

51.52

48.33

1.85

82.21

87.35

92.52

87.09

3.00

0.537

0.555

0.566

0.555

0.006

32(41)

50.06

53.71

56.79

53.42

1.83

90.67

95.55

102.55

95.62

3.24

0.547

0.559

0.570

0.559

0.005

33(37)

54.33

59.72

62.85

59.53

2.07

96.84

105.50

112.56

105.70

3.99

0.552

0.563

0.574

0.563

0.005

34(35)

61.17

64.71

68.34

64.67

1.96

108.27

114.50

119.42

114.23

3.33

0.549

0.566

0.576

0.566

0.006

35(32)

66.38

71.49

75.62

71.17

2.11

116.17

125.30

133.37

124.85

3.88

0.557

0.570

0.580

0.570

0.005

36(31)

74.18

79.38

82.95

79.02

2.49

129.98

138.51

143.51

137.63

4.01

0.560

0.574

0.583

0.574

0.006

37(29)

80.42

84.62

88.64

84.69

2.40

138.66

146.40

153.01

146.53

4.33

0.563

0.579

0.585

0.578

0.005

38(27)

85.39

90.73

93.73

90.11

2.50

145.47

156.67

163.10

155.28

4.40

0.570

0.581

0.588

0.580

0.005

38(27)

91.03

94.84

98.21

94.74

1.96

156.14

162.09

168.53

161.82

3.44

0.577

0.585

0.595

0.585

0.003

40(26)

96.38

100.46

103.28

100.23

1.80

163.08

170.74

175.05

170.21

3.26

0.579

0.590

0.597

0.589

0.004

  1. GA gestational age, SD standard deviation
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