Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Fiducial marker and known left mid lung opacity laterally is better seen on prior CT scan and known pulmonary nodules are not clearly delineated on this portable exam . Increased interstitial markings throughout the lungs are again noted but are likely chronic . Increased bibasilar opacities are likely atelectasis given the low lung volumes . The cardiomediastinal silhouette is stable . Left chest wall single lead pacing device is again seen .
    OUTPUT:
    
No definite acute cardiopulmonary process . Known pulmonary nodules are better seen on prior CT scan .