Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new opacity in the right medial lung base , concerning for pneumonia . Moderate atelectatic changes are seen in the bilateral lung bases . Small bilateral pleural effusions are likely . Severe cardiomegaly is unchanged since ___ . A left pectoral pacemaker is noted with transvenous leads in the region of the right atrium and right ventricle . No pneumothorax .
    OUTPUT:
    
New opacity at the right medial lung base is concerning for pneumonia .