Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are within normal limits . The bilateral hila are unremarkable . Lung volumes are slightly low . An area of opacification overlying the heart on lateral view may represent focal consolidation . The lungs are otherwise clear without focal consolidation . There is no evidence of pulmonary vascular congestion . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Possible opacity in the right middle lobe projecting over the heart may reflect developing pneumonia . No evidence of consolidation or other acute cardiopulmonary process elsewhere .