Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar peripheral lung markings are compatible with interval progression of pulmonary fibrosis . There is no focal pulmonary consolidation or pleural effusions . There is a dual lead left - sided cardiac pacemaker in appropriate position , and a redundant pacemaker lead is again noted in the right hemithorax . The cardiac and mediastinal silhouette is within normal limits .
    OUTPUT:
    
Bibasilar peripheral markings compatible with interval progression of pulmonary fibrosis since ___ . No acute cardiopulmonary process , but given underlying pulmonary disease , evaluation is somewhat limited .