Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable view of the chest provided . There is improved aeration in the lower lungs as compared to the prior exam . No convincing evidence for pulmonary edema . No effusion or pneumothorax is seen . The cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
No convincing signs of pneumonia . Improved aeration in the lower lungs as compared with prior .