Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Lung volumes are low . Heart is mildly enlarged . The aorta is unfolded . No focal consolidation , large effusion , or pneumothorax is seen . Bony structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild cardiomegaly . No signs of pneumonia .