Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are within normal limits . The bilateral hila are unremarkable . There is a subtle right upper lobe opacity which is new since prior examinations . The lungs are otherwise clear . There is no evidence of pulmonary vascular congestion . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Subtle right upper lobe opacity could represent pneumonia . Consider lordotic views if possible , or short interval followup radiograph following treatment for pneumonia .