Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable moderate enlargement of the cardiac silhouette . A dual lead left chest wall pacer is in unchanged position with the leads in the expected location of the right atrium right ventricle . The previously seen multifocal opacities have largely resolved ; however , there is a new focal opacity in the right middle lobe and possibly in the left lower lobe . No pleural effusion or pneumothorax .
    OUTPUT:
    
Resolution of previously seen multifocal right pulmonary opacities with new right mid lung and left lower lobe opacities . Given the waxing and waning fleeting opacities , cryptogenic organizing pneumonia or Loffler syndrome are on the differential . Vasculitis is also possible ; although , less likely given the time course . If clinically warranted correlation with tissue diagnosis could be considered .