Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate linear atelectasis in the bilateral bases , right greater than left , the lungs are otherwise well expanded and clear . There is no pleural effusion or pneumothorax . The cardiac silhouette is normal , the mediastinal contours are normal . The pulmonary vasculature is normal in appearance .
    OUTPUT:
    
Opacities most consistent with linear bibasilar atelectasis , without pneumonia or pneumothorax .