Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Upper mediastinal contours are normal . Lung volumes are low . No focal consolidation , pleural effusion , or pneumothorax . Osseous structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild cardiomegaly , otherwise unremarkable .