Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes continue to be low with bilateral perihilar and right basilar opacities , consistent with known sarcoidosis . Aeration of the right base appears slightly improved from ___ . Bilateral costophrenic blunting appears similar , likely representative of pleural thickening rather than trace pleural effusions . There is stable mild cardiomegaly , and there is no sign of intra-abdominal free air .
    OUTPUT:
    
Low lung volumes with similar appearance of bilateral perihilar and right basilar opacities compatible with known sarcoidosis . No signs of pneumoperitoneum .