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Figure 1 Echography and three-dimensional computed tomography (3D-CT). (a) The diaphragm, peritoneum, and liver11) on echography. (b) The diaphragm and liver on 3D-CT. The diaphragm was selectively extracted from the CT data using a workstation to reconstruct a stereoscopic image, and the total muscle volume was measured. To confirm the accuracy and reproducibility of the diaphragm muscle volume measurements on CT, all cases were measured three times by two observers, and the intraclass correlation coefficients for each observer and interobserver correlations were determined.Figure 2 Operating steps for the assessment of the diaphragm volume during deep inspiration. (a) All computed tomography (CT) data are imported into the workstation software. (b) The diaphragm is selected and extracted. (c) The diaphragm is reconstructed. (d) The color mapping operation screen is shown. (e) The volume is measured.483

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