Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar interstitial opacities are similar to multiple prior studies with decreased lung volumes causing bronchovascular crowding compared with the immediate prior study . There is no definite focal consolidation to suggest interval pneumonia . There is no pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
No definite acute cardiopulmonary process , although new superimposed pneumonia is difficult to exclude in the setting of extensive chronic bibasilar interstitial changes . s