Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are improved . Patchy right basilar opacities are similar to prior . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is top - normal . No free air below the right hemidiaphragm is seen . The left hilum is prominent , likely due to the enlarged main pulmonary artery seen on prior CT .
    OUTPUT:
    
Right basilar atelectasis . No pneumonia .