Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate increased opacification of the left lower lobe with air bronchograms , consistent with lobar pneumonia . There is a small left pleural effusion . The right lung is clear . The cardiomediastinal and hilar contours are unremarkable . There is no pneumothorax .
    OUTPUT:
    
Left lower lobe pneumonia .