Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate low lung volumes with resulting bronchovascular crowding . There is an area of increased opacification of the right base , which partially obscures the right heart border , concerning for right middle lobe pneumonia . The cardiomediastinal contour is unremarkable . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Opacification the right base which partially obscures the right heart border , concerning for right middle lobe pneumonia .