Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are within normal limits . The pulmonary vasculature is normal . Patchy and linear opacities in the lung bases are likely reflective of atelectasis . No focal consolidation , pleural effusion or pneumothorax is demonstrated . Compression fracture of the L2 vertebral body is re - demonstrated .
    OUTPUT:
    
Mild bibasilar atelectasis .