Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . There is increased density at the right lung base which has posterior correlate on lateral view which could be representative of atelectasis , aspiration or pneumonia . Lungs are otherwise clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Increased density at the right lung base with posterior - lateral correlate which could represent atelectasis , aspiration or pneumonia .