Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . A subtle right middle lobe opacity is best seen on the lateral view , new from the prior examination . There is no pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is unchanged from the prior examination .
    OUTPUT:
    
New , subtle right middle lobe opacity which may reflect developing pneumonia versus aspiration .