Thoracic CT ScanThis transverse chest computerized tomography (CT) scan shows rightward mediastinal shift, coronary calcifications and stents, the elevation of the left hemidiaphragm, herniation of gastric contents into the thoracic cavity (arrow denotes the abnormal presence of abdominal contents, indicated by air-fluid levels, in the left thoracic cavity) with compressive atelectasis of the left lower lung, and lack of mediastinal adenopathy.