Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal and enteric tubes are stable in position . Heart size is normal and lungs are clear aside from linear atelectasis at the right lung base . Left lower lobe is improving over the prior studies . No pleural effusion or pneumothorax .
    OUTPUT:
    
Satisfactory position of support lines and tubes . No evidence of pneumonia or pulmonary edema .