Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Unchanged elevation of the left hemidiaphragm with mildly increased overlying atelectasis and possible trace left pleural effusion . No pneumothorax identified . Mildly increased pulmonary vascular congestion . The size and appearance of the cardiac silhouette is unchanged .
    OUTPUT:
    
Slight interval increase in the left lower lung zone atelectasis . New mild pulmonary vascular congestion .