Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unremarkable . Patchy opacities in the lung bases may reflect aspiration , atelectasis or pneumonia . No pleural effusion or pneumothorax is present . There is no pulmonary vascular congestion . No acute osseous abnormalities detected .
    OUTPUT:
    
Bibasilar patchy opacities , more so on the left , may reflect atelectasis , aspiration or infection .