Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube ends in the lower trachea . Left IJ central venous catheter ends in the mid to lower SVC . Nasogastric tube courses below the hemidiaphragm , tip not visualized . The left costophrenic angle has been excluded from the field of view . Left - sided chest tube is unchanged in position . A partially imaged VP shunt catheter has no kinks or discontinuities along its imaged course . There is no pneumothorax . Small subcutaneous emphysema is unchanged . The previous left basilar airspace opacity has cleared , and may have been due to atelectasis . Mild vascular engorgement without frank edema is unchanged . The cardiomediastinal silhouette is normal despite the projection .
    OUTPUT:
    
Interval resolution of left basilar airspace opacity , which may have been due to atelectasis .