Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable frontal upright view of the chest was obtained . Confluent airspace opacification in the right lower lung has slightly improved . The left lung remains clear . Heart is stable in size and cardiomediastinal contour is otherwise unremarkable . There is no large effusion or pneumothorax .
    OUTPUT:
    
Slightly improved appearance of right lower lung pneumonia ; otherwise unchanged .