Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates interval improvement in the extensive peribronchial infiltration and pulmonary consolidation . Small left - sided pleural effusion . Heart size is normal . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax .
    OUTPUT:
    
Interval improvement in extensive pulmonary consolidation and peribronchial infiltration .