Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiographs demonstrate low lung volumes . Vague opacity in the right lower lobe likely reflects pneumonia . Streaky opacity in the left lung base is most compatible with atelectasis . Cardiomediastinal contour is unremarkable . There is no pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Probable pneumonia at the right lung base .