Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show minimal interval improvement in wedge - shaped opacification of the right lung base projecting anteriorly over the heart on the corresponding lateral radiograph , which may represent partial right middle lobe collapse . No pleural effusion or pneumothorax is present . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are unchanged and within normal limits . Eventration of the right anterior hemidiaphragm is stable .
    OUTPUT:
    
Improved but persistent right middle lobe collapse , not fluid in the minor fissure . A followup chest radiograph in four weeks is recommended to confirm resolution . If opacification persists , a CT could be considered at that time for evaluation of the airway .