Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest . There is an opacity in the right upper lung concerning for pneumonia . Lungs otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Opacity in the right upper lung concerning for pneumonia . Recommend repeat chest radiographs in 4 weeks after treatment to exclude mass .