Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are seen which limit assessment . There is a an opacity , which obscures the right heart border , concerning for an early developing right middle lobe pneumonia . The remainder of the lungs are clear without pleural effusion or pneumothorax . The heart is normal in size . Normal cardiomediastinal silhouette .
    OUTPUT:
    
Possible early developing right middle lobe pneumonia .