Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Allowing for technique , the cardiac , mediastinal and hilar contours appear unchanged . The heart size is difficult to evaluate . Aside from a linear opacity projecting over the left mid lung , suggesting minor lingular atelectasis or scarring , the lungs appear clear . There are no pleural effusions or pneumothorax . The bony structures are unremarkable .
    OUTPUT:
    
Low lung volumes with no definite evidence of acute disease . Minor left basilar atelectasis and lingular scarring or atelectasis .