Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . As on prior there are increased interstitial opacities suggestive of chronic underlying disease . On the frontal view there is increased retrocardiac opacity with no correlate on the lateral view and may be due to atelectasis . There is no effusion . Cardiomediastinal silhouette is unchanged . Dual lead pacing device is again noted . No acute osseous abnormalities detected .
    OUTPUT:
    
No definite acute cardiopulmonary process .