Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate persistent linear atelectasis in the bilateral lower lobes which was new on ___ . The lungs are otherwise clear . There is no pneumothorax or pleural effusion . The thoracic aorta appears mildly enlarged , without focal aneurysmal dilation . The heart size is normal . Pulmonary vascularity is normal .
    OUTPUT:
    
1 . Persistent bilateral lower lobe atelectasis . 2 . No evidence of pneumonia or decompensated heart failure . 3 . Mild enlargement of the thoracic aorta without focal aneurysmal dilation , could be further assessed with CT .