Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is slightly enlarged which is likely due to technique . The aortic knob is calcified . There is mild pulmonary vascular congestion . Bibasilar opacities are most consistent with atelectasis as seen on the prior CT . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No pleural effusion or pulmonary edema .