Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph was provided . Again seen are bilateral pulmonary opacities , unchanged since the prior exam . A small right effusion is stable . There may be a trace left pleural effusion . Cardiomediastinal silhouette is unchanged . Median sternotomy wires are intact . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
No significant change from the prior exam . Stable right pleural effusion .