Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and slightly lower lung volumes compared to ___ . A moderate right pleural effusion is unchanged . There is slightly increased opacity at the left lung base , unclear if this is due to atelectasis versus mildly increased edema versus an early developing pneumonia . There is no pneumothorax . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . Increased mild pulmonary edema . Mildly increased opacity at the left lung base , unclear if this is superimposed atelectasis versus an early developing pneumonia . 2 . Unchanged moderate right pleural effusion .