Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . A tracheostomy tube is unchanged in position . A left subclavian central venous catheter terminates at the cavoatrial junction . The lung volumes are low . The heart size is top normal . The hilar and mediastinal contours remain within normal limits . A previously seen right upper zone lung opacity has resolved , compatible with aspiration . However , there is new slight obscuration of the right hemidiaphragm , concerning for aspiration versus small consolidation .
    OUTPUT:
    
1 . New slight obscuration of the right hemidiaphragm , concerning for right lower lobe aspiration versus consolidation . 2 . Interval resolution of the right upper zone opacity , reflecting prior aspiration .