Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is unchanged . Evaluation of heart size is limited to the low lung volumes , AP projection , and bilateral airspace opacities . There is again seen a calcified thoracic aorta . There are again seen areas of diffuse bilateral airspace opacities . In particular , the right lower lobe appears better aerated , with improved visualization of right hemidiaphragm and right heart border . The left upper lobe is worse , and has developed more confluent areas of consolidation . This may reflect redistribution of pulmonary edema , or possibly overlying secondary process involving left upper lobe such aspiration or pneumonia . There is no pneumothorax or effusion .
    OUTPUT:
    
Improved aeration of right lower lobe and worsening of consolidation involving left upper lobe , suggesting either redistribution of pulmonary edema due to change in patient positioning or overlying secondary process involving the left upper lobe such as pneumonia or aspiration pneumonitis .