Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tip of endotracheal tube terminates about 4 .4 cm below the superior aspect of the aortic knob . Swan - Ganz catheter terminates in the distal right pulmonary artery , and nasogastric tube terminates within the stomach , although the side port is in close proximity to the GE junction . There remains marked volume loss in the left hemithorax , with a substantial shift of cardiomediastinal structures towards the left . In the absence of more remote radiographs for comparison , it is uncertain whether the left - sided volume loss is longstanding ( for example related to previous surgery or chronic scarring ) , or a more acute process . There remains extensive lung opacification predominantly in the left lower lobe , as well as a moderate left pleural effusion . The right lung is markedly overexpanded , and demonstrates severe emphysema in the upper and mid lung regions . Developing opacity at the right lung base is concerning for an evolving pneumonia in this region . A probable small right pleural effusion has developed , and there is a questionable tiny right apical pneumothorax .
    OUTPUT:
    
Marked volume loss in left hemithorax of uncertain chronicity . In the absence of outside radiographs for comparison , consider contrast - enhanced CT to exclude a central mass as a potential cause for extensive left lung volume loss and associated left lower lung atelectasis / consolidation . Evolving right lower lobe pneumonia .