Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: At the left base , there is a suggestion of a rounded opacity behind the cardiac silhouette , which was not definitely present on the prior exam . Evaluation of this region is somewhat limited due to low lung volumes . Biapical left worse than right scarring is noted . No other focal opacity is identified . There is no pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Scoliosis in the upper thoracic spine is unchanged . Fracture of the proximal right humerus is old .
    OUTPUT:
    
Small focal opacity at the left base , which is poorly evaluated due to low lung volumes , may represent pneumonia . If possible , a repeat radiograph with improved inspiration performed in the radiology department and including lateral view suggested to better characterize this opacity .