Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is accentuated as a result of low lung volumes , and is borderline enlarged . Mediastinal and hilar contours are unremarkable , and there is no evidence of pulmonary edema . Linear opacity in the left lung base is compatible subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .