Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . There is no focal consolidation or pneumothorax . Small left pleural effusion has decreased in size since ___ . There is no right pleural effusion . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . Sternotomy wires appear intact . Multiple surgical clips project over cardiomediastinal silhouette . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
In comparison to ___ exam , there is interval decrease in small left pleural effusion .