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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 1 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 1

From: Application of 320-row multidetector free-breathing cine CT in diagnosis of pediatric expiratory central airway collapse

Fig. 1

Cross-sectional area measurements by cine CT. Three predefined areas were selected for measurement at end-inspiratory phase: a at aortic arch level, b at carina and c at bronchus intermedius. Measurements were obtained at lung window setting by manually drawing ROI outlining airway lumen at end-inspiratory phase. Double oblique method was used to ensure true axial section of the airway measured. The same measurements at the same levels were repeated during end-expiratory phase (not shown) to calculate the percentage of airway collapse

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