Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . The heart size appears normal . The aorta is unfolded . No large pleural effusion or pneumothorax is seen . There is mild prominence of the interstitial markings , which could reflect chronic disease . There is no definite sign of CHF . Bony structures appear intact . There is no free air below the right hemidiaphragm .
    OUTPUT:
    
No definite signs of pneumonia . Coarsened interstitial markings likely reflect underlying chronic lung disease .