Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes , which results in bronchovascular crowding . There has been interval removal of the endotracheal tube , nasogastric tube , two mediastinal drainage catheters , and epicardial pacing wires . The cardiac portion of the mediastinum is moderately larger and a much larger triangular gas and debris collection projecting over the left lower lobe bronchus could be in the stomach , esophagus , mediastinum or pericardium . . The left hemidiaphragm is asymmetrically elevated . There is some left lower lobe atelectasis . No pneumothorax .
    OUTPUT:
    
Air and debris collection it could be in the pericardium , mediastinum , or in the esophagus or herniated stomach . Recommend PA and lateral radiographs of the chest for further evaluation .