Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low causing crowding of the central bronchovascular structures . The heart is mildly enlarged , and there is mild pulmonary vascular congestion . There is possible fluid along the right minor fissure , and no focal consolidation or pneumothorax is seen .
    OUTPUT:
    
Low lung volumes . Mild cardiomegaly and pulmonary vascular congestion . Possible small right pleural effusion .