Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right PICC is again noted with tip in the right atrium . Lung volumes are low and the left costophrenic angle is excluded from the field of view . There is likely bibasilar atelectasis although the upper lungs are grossly clear . Lung apices are obscured by patient 's chin . Tracheostomy tube is in appropriate position . Atherosclerotic calcifications seen at the aortic arch .
    OUTPUT:
    
Right PICC tip in the right atrium . Low lung volumes without definite acute cardiopulmonary process .