Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild pulmonary vascular congestion , not significantly changed from the prior study . Left basilar / retrocardiac opacitites have increased since the prior which could be due to atelctasis or infection . There is blunting of the costophrenic angle on the left , which likely represents a small pleural effusion . The right costophenic angle is excluded , but a small right effusion is suspected . The cardiomediastinal silhouette and hilar contours are unchanged . There is no pneumothorax .
    OUTPUT:
    
Mild pulmonary vascular congestion and superimposed left basilar / retrocardiac opacitites have increased since the prior which could be due to atelctasis or infection .