Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided pigtail catheter is in unchanged position . Since the prior exam , the small right apical pneumothorax is less conspicuous , and no longer visible . There is no definite left pneumothorax . The lungs are clear without consolidation or edema . There is no pleural effusion . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Interval resolution of the right apical pneumothorax . Unchanged position of the right pigtail catheter .