Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest re - demonstrate linear opacities in the bilateral lung bases greater on the right than the left , which are stable dating back to ___ and may reflect changes associated with chronic bronchiectasis , atelectasis and / or scarring . There is no focal consolidation concerning for pneumonia , pleural effusion or pneumothorax . Biapical scarring appear symmetrical . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . The trachea is midline . There is no free air beneath the right hemidiaphragm . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary process .