Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Extensive peribronchial opacities which predominantly occupy the upper lung lobes , right worse than left and affecting predominantly the right perihilar region , are consistent with known diagnosis of sarcoidosis . There is calcified mediastinal and hilar lymphadenopathy . There is no pneumonia , pleural effusions , or pneumothorax . Left upper lung rounded opacity has not significantly changed from prior radiographs .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Extensive interstitial changes consistent with known diagnosis of sarcoidosis and unchanged left upper lung rounded opacity .