Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are low . The heart appears enlarged . No definite consolidation , large effusion or pneumothorax . No overt pulmonary edema . Mediastinal contour appears normal . Bony structures are intact .
    OUTPUT:
    
Cardiomegaly . Limited exam due to low lung volumes . No convincing evidence for pneumonia .