Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . The lung volumes are low . No definite sign of pneumonia or CHF . The heart is mildly enlarged , though this appears stable . Aorta is unfolded . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly . No signs of pneumonia or CHF .