Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volume is small . Bilateral lower lobe opacities have increased compared to prior , more on the left . The right opacity is more likely atelectasis . Although the left lower lobe opacities do not obscure the left heart border or left hemidiaphragm , pneumonia can not be ruled out . A lateral chest radiograph could provide more definitive information . No pleural effusion or pneumothorax . The hila and pulmonary vasculature are normal . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Left lower lobe opacities could be due to pneumonia . Lateral views radiograph would provide more definitive information . The right lower lobe opacity is more likely atelectasis .