Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest show resolution of previously - seen left apical pneumothorax , which has been slowly decreasing since the first week in ___ . The appearance at the left apex now resembles the patient 's pre-ptx study from ___ . The lungs are hyperinflated but there is no superimposed consolidation . Apparent nodular density on the right laterally corresponds to nipple shadow and is also seen on the ___ film . The heart and mediastinal contours are narrow ( baseline ) . Pacer device over the left chest with two intact leads in unchanged position . Note is made of patient 's arm overlying the mid chest on the lateral view . No acute fractures are seen .
    OUTPUT:
    
1 . Resolution of left apical pneumothorax with appearance now resembling images from prior to the patient 's pacemaker placement . 2 . Emphysema .