Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are low . VP shunt courses along the right hemi thorax . There is increasing opacity at the right lung base which is concerning for an early pneumonia . There is also bibasilar atelectasis . No large effusion or pneumothorax is seen . No overt edema . The heart size is difficult to assess though appears grossly stable . Mediastinal contour also appears essentially stable from prior .
    OUTPUT:
    
Subtle increased opacity at the right lung base could represent pneumonia in the correct clinical setting . Also noted are bibasilar atelectatic changes .