Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Mild cardiomegaly is stable . There are bibasilar opacities , stable , likely reflecting chronic atelectasis / aspiration . There are aortic knob calcifications . The mediastinal and hilar contours are normal . No large pleural effusion . No pneumothorax .
    OUTPUT:
    
Stable bibasilar opacities , likely the sequela of chronic aspiration and atelectasis .