Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior radiograph lung volumes are lower with interval increase in bilateral scattered parenchymal alveolar and interstitial opacities with visualization of air bronchograms . Cardiomediastinal silhouette and hilar contours are unchanged but difficult to evaluate in the background of scattered opacities . There is no large effusion or pneumothorax .
    OUTPUT:
    
Lower lung volumes and interval worsening of scattered parenchymal alveolar and interstitial opacities particularly in the left lower lung compatible with either infection or hemorrhage .