Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . A patchy opacity projecting over the left mid lung , probably in the lingula , suggests minor unchanged atelectasis . Although the deep posterior costophrenic sulci are partly excluded on the lateral view , there is no indication for pleural effusion . There is no pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .