Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral pulmonary opacities are somewhat improved since the prior study of ___ . The cardiac silhouette is obscured by these opacities but is grossly normal . The mediastinum and hilar contours are stable . There is no pleural effusion or pneumothorax . Aorta is tortuous and calcified .
    OUTPUT:
    
Improved but persistent bilateral opacities which are better characterized on recent CT of the chest compatible with pneumonitis .