Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show bibasilar linear atelectasis on the left greater than the right . No pleural effusion , focal consolidation , or pneumothorax is present . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . Moderate degenerative changes of the thoracic spine are noted .
    OUTPUT:
    
Bibasilar atelectasis on the left greater than the right . No pneumonia .