Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the most recent prior chest radiograph , there is interval development of multifocal airspace opacity throughout the right lung concerning for multifocal infectious process . The left lung is relatively clear . There is no pleural effusion or pneumothorax . The pulmonary vasculature is essentially within normal limits . A left pectoral pacemaker is unchanged with dual leads terminating in the right atrium and right ventricle , as before . The cardiac silhouette is enlarged but stable . The mediastinal contours are within normal limits .
    OUTPUT:
    
New multifocal airspace opacities in the right lung concerning for multifocal pneumonia .