Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged . The aorta demonstrates vascular calcifications and mild unfolding . Diffuse interstitial opacities with reticulation are noted , most pronounced at the lung bases , suggestive of an underlying chronic interstitial lung disease with probable fibrosis . Additionally , there appears to be mild pulmonary vascular engorgement . No pneumothorax is definitively noted nor is there pleural effusion . No acute osseous abnormality is seen .
    OUTPUT:
    
Diffuse interstitial and reticular opacities predominantly within the lung bases , raises the possibility of underlying chronic interstitial lung disease , and comparison with any prior studies is recommended . Mild pulmonary vascular congestion . A superimposed infectious process within the lung bases can not be excluded .