Fig. 4From: Thoracic abnormal air collections in patients in the intensive care unit: radiograph findings correlated with CTPneumothorax in the subpulmonary space of a 36-year-old woman with interstitial pneumonia. a A supine radiograph shows a hyperlucent upper quadrant of the abdomen (black asterisk). The inferior surface of the lung (arrowheads), a sharply outlined diaphragm (black arrows), the sharp delineation of the inferior vena cava (IVC) (white arrow), and the “deep sulcus” sign (white asterisk) are also visible. b A coronal CT image clearly depicts the inferior surface of the lung (arrowheads), a sharply outlined diaphragm (black arrows), the sharp delineation of the IVC, and the “deep sulcus” sign (white asterisk)Back to article page