Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are normal . There Right middle lobe opacity is more linear in appearance , consistent with atelectasis , though more confluent opacity is seen in the right lower lobe , consistent with pneumonia . Nodular opacity at right lung base is probably a nipple shadow but may be confirmed with nipple marker radiographs . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Right lower lobe pneumonia . Follow - up examination is recommended in 4 weeks after completion of antibiotic therapy to ensure resolution . At that time , nipple markers may be placed to ensure that a nodular opacity at the right base is due to a nipple shadow rather than a lung nodule .