Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , PA and lateral . There are linear opacities in the bilateral lower lobes extent similar to the prior radiograph . There are no convincing air bronchograms . The upper and mid lungs are clear . The there is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . The hilar and cardiomediastinal contours are normal .
    OUTPUT:
    
Bilateral lower lobe atelectasis with similar appearance to prior radiograph from 10 days ago . However , pneumonia in the appropriate clinical setting can not be excluded .