Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar , rounded airspace opacities are noted , more conspicuous on the right . The upper lungs are clear . There is no pleural effusion , pneumothorax , or overt pulmonary edema identified . The right hila is noted to be mildly prominent relative to the prior examination , and likely reflects reactive adenopathy . The cardiac silhouette is within normal limits .
    OUTPUT:
    
Bibasilar airspace opacities compatible with multi focal pneumonia . FOLLOWUP CHEST RADIOGRAPH IN 4 WEEKS IS ESSENTIAL EVEN IF THE PATIENT IMPROVES CLINICALLY , TO EXCLUDE A CONDITION OTHER THAN PNEUMONIA .