Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . A vague opacity is noted projecting over the right cardiophrenic angle , without obscuration of the right heart border . There might be some streaky retrocardiac opacities , but no other focal opacities are seen . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Findings compatible with right lower lobe pneumonia . Retrocardiac subsegmental atelectasis may be present as well .