Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiographs obtained ___ , no significant changes are appreciated . Bibasilar linear opacities are consistent with focal scarring . Lungs are otherwise fully expanded and clear without focal consolidations . Heart size is top normal with no pulmonary vascular congestion or pulmonary edema . No pleural effusions . Kyphosis , sclerosis , and adjacent disc space obliteration of the thoracic spine are unchanged . An opacity projecting over the anterior left third rib corresponds to a known , old rib fracture .
    OUTPUT:
    
No radiographic evidence of pneumonia or other acute cardiopulmonary abnormalities .