Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours demonstrate clips about the bilateral hila . Perihilar consolidation / scarring is present on the right and the hemidiaphragm is chronically elevated , likely reflecting components of post-resection and radiation changes . There is no pneumothorax . Best seen on lateral view is pleural fluid tracking along the anterior and posterior pleural spaces on the right . The degree of pleural effusion has decreased from prior PET - CT , but is more than on prior chest x-ray .
    OUTPUT:
    
Improvement in right pleural effusion .