Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no evidence of pneumothorax . There are new metallic densities projecting over the left upper lobe with left upper lobe collapse . There is tracheal deviation to the left , secondary to volume loss . There is no pleural effusion . The cardiomediastinal silhouette is unchanged . Severe emphysematous changes are noted .
    OUTPUT:
    
Left upper lobe collapse . No evidence of pneumothorax .