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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