Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes but no focal consolidation , pulmonary vascular congestion , or pneumothorax . Blunting of the left costophrenic angle again may represent a small effusion or atelectasis . There is borderline cardiomegaly , unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .