Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is interval development of heterogeneous airspace opacities in the right lower lung . Previously noted pulmonary vascular congestion has improved . Heart is top - normal size and mediastinal contour is within normal limits . Calcifications are present in the aortic arch . There is no large effusion or pneumothorax .
    OUTPUT:
    
Interval development of heterogeneous airspace opacities in the right lower lung is consistent with pneumonia in the appropriate clinical context .