Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded . There is a possible developing opacity in the right mid lung zone . There is no pulmonary edema . Blunting of the right costophrenic angle is likely due to the small pleural effusion , which was better assessed on the lateral chest radiograph from one day earlier . There is no definite left pleural effusion . There is no pneumothorax . The cardiomediastinal silhouette is normal . The slight apparent enlargement of the heart is likely due to the AP technique .
    OUTPUT:
    
Possible developing opacity in the right midlung zone . This may represents a pneumonia . Recommend short interval followup with a repeat chest radiograph in 12 hours .