Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , there is obscuration of the right hemidiaphragm , concerning for pneumonia . No appreciable pleural effusion is seen . Left lung is mostly clear . The heart size is unchanged . The mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Right lower lobe pneumonia . Repeat chest radiograph in 4 weeks following antibiotic therapy is recommended .