Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Obscuration of the right heart margin is compatible with mild right middle lobe atelectasis which has been present on multiple prior chest radiographs and was well demonstrated in the chest CT from ___ . No focal opacities are identified concerning for pneumonia . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Chronic minimal right middle lobe atelectasis .