Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unremarkable . Mildly low lung volumes with crowding of bronchovascular markings are noted . Both lungs show no evidence of pleural effusion or pneumothorax . Mild opacification of the right lung base may represent atelectasis .
    OUTPUT:
    
Bilateral low lung volumes with crowding of bronchovascular markings and mild right basilar atelectasis .